How do you calculate x 2 5 35?

x/2=35+5

x/2=40

x=80 gives x=80

Solve equations. Notes.

1.An equation containing unknowns is called an equation, and it can also be said that an equation containing unknowns is an equation.

2.The value of the unknown that makes the equation true, called the solution of the equation, or the root of the equation.

3.Solving an equation is the process of finding the values of all the unknowns in the equation.

4.An equation must be an equation, and an equation does not have to be an equation. An equation without unknowns is not an equation.

5.Validation: After the equation is generally solved, it needs to be verified. Verification is to substitute the value of the solved unknown into the original equation to see if both sides of the equation are equal. If it is equal, then the value obtained is the solution of the equation.

6.Precautions: Write the word "solution", align the equal sign, and test.

7.The equation relies on the relation of the parts of the equation, and the relation of the parts of addition, subtraction, multiplication and division (addition + addition = sum, sum - one of the additions = another addition, difference + subtraction = subtraction, subtraction - subtraction = difference, subtraction - difference = subtraction, factor factor = product, product of one factor = another factor, dividend.

divisor = quotient, dividend quotient = divisor, quotient divisor = dividend).

Methods for solving equations.

Estimation method: An introductory method when you are just learning to solve equations. The solution of the equation is directly estimated and then verified by substitute for the original equation.

Apply the properties of the equation to solve the equation.

Merge items of the same kind.

Deform the equation into a monomial.

Move Item: Moves the item with an unknown number to the left, constant item.

Move to the right. For example: 3+x=18

Solution: x=18-3

x=15 deparentheses: Apply the deparenthesis rule.

Remove the parentheses from the equation.

4x+2（79-x）=192

Solution: 4x+158-2x=192

4x-2x+158=192

2x+158=192

2x=192-158

x=176.Formula method: There are some equations that have been studied in the general form of the solution, which become fixed formulas, and can be directly used by formulas. Solvable multivariate higher-order equations generally have formulas to follow.

7.Function image.

Method: The solution of the equation is used to solve the geometric meaning of the intersection of two or more correlation function images.

According to the calculation order, the sedan car can be calculated directly, the original Qiansen formula = 50-5 = 45, the spring or use a simple algorithm, the original formula = 5x(10-1) = 5x9 = 45. Both algorithms can be calculated in any way, and the result is the same.

It's relatively simple and detached.

Equal to 50-5 is equal to 45. or (10-1) 5=45.

Calculate multiplication first and then subtraction, 10 5-5 50-5 45, according to the calculation algorithm of multiplication and division and then addition and subtraction.

When we are learning the imitation hole of mathematics, the teacher will tell you that the algorithm for this problem is 10, 5 is equal to 50, and then -5 is equal to 45.

In this problem, multiplication belongs to the second-level equation, first calculate the multiplication, then it is 10 5 = 50, and then subtract five to equal 45.

Multiply and divide first, then add and subtract.

The number is 45

Multiplication is calculated first, and then subtraction is calculated.

The calculation method of the four operations is based on the stool: multiply and divide first, then add and subtract.

You're good at the edge, and you're very happy with your question.

10x5-5

Equal to (10-1) Danzi x5

Equal to 9x5 equals 45

With a simple algorithm, this is calculated: =

Off-the-shelf brother and grandson count 75 6 5

Solution: Four operations.

Rules (calculated in order, multiplication and division first and then addition and subtraction, with parentheses first with parentheses, with multiplication.

Calculate the power first) i.e. an off-form operation (recursive equation.

calculations) need to be carried out under the premise of this principle. Problem solving process:

Extended Information [Reduction Process]: The basis for judging whether a fraction is the simplest fraction can be based on the common factor of the numerator and denominator.

whether there is only 1, if there is only 1, the score is the simplest fraction, and vice versa; If the numerator and denominator are decimal, they can be rounded before being judged.

Solve the problem through the trace of Cheng Xianzhou chain:

Because the common factor of the numerator and denominator is [1, 5].

75 5: The simplest score is 15

If you have any doubts, please ask and be satisfied.

Xiaohu is a careless child, when doing a division calculation, he takes the divisor five sixths as five eighths to calculate, and the result is 120 in Chunchong, what is the correct answer to this question? 120*5 8 divided by 5 6 = 75*6 5 = 90 Answer: The correct answer to this question is 90. 

Summary. Hello, here for you to find out that four-fifths of 120 are 24. A fifth is expressed as 4 and 4 fifths can be understood as dividing 120 into 5 equal parts and calculating what the value of the first part is.

Divide 120 by 5, and the result is 24, that is, the fifth of 120 is 4 times 24 times 4 to get 96. You can also directly multiply 120 by four-fifths of the fraction, i.e., 120 4 5 = 120 5 times 4 = 96. From the above two algorithms, it can be seen that 4/5 of 120 is 96.

120 4 5, how to calculate?

Hello, here for you to find 120 did not guess the hall four out of five is 24. One-fifth is expressed as four-fifths of a fraction of a four, which can be understood as dividing 120 into 5 equal parts, and calculating the value of the first equal part. Divide 120 by 5, and the result is 24, that is, the fifth of 120 is 4 times 24 times 4 to get 96.

You can also directly use the fraction of 120 multiplied by four-fifths of Zhaosui, that is, 120 4 5 = 120 5 multiplied by 4 = 96. From the above two algorithms, it can be seen that 4/5 of 120 is 96.

Related information: 120*4 5 The simple operation method is as follows: 120*4 5=(100+20)*4 5=100*4 5+20*4 5=80+16=96 This is an integer multiplied by a fraction, first write the integer 120 in the equation as the sum of two numbers 100+20, so that the equation becomes the tung infiltration and multiplication of two numbers, which conforms to the distributive law of the multiplication method. Multiply 4 by 5 by the numbers 100 and 20 respectively.

Add the two products together, and the result is 96.

Solve the equation: 2m = 200 5

2m=40m=20

Answer: m equal to 20 is the solution of the equation.

Hello, first divide 48 by the denominator.

5", which is equal to 48 good hail 5=, and then multiplied by the numerator "2" is equal to Youyuanfan, and finally 48 times five splits is equal to 19,2