60X 30X 120 How to solve equations

The solution of 120-x 30 is x=90. The solution process is as follows.

Solution: 120-x=30

120-x-120=30-120

x=-90x=(-90)÷(1)

x=90, i.e., the solution of equation 120-x=30 is x=90.

Summary. 60x+120=90x120=90x-60x30x=120x=4

60x+120=30x3 to solve the equation.

60x+120=90x120=90x-60x30x=120x=4 Here you can find the value of the unknown by moving the term and then calculating.

This is the solution of a one-dimensional equation.

There is only one unknown number (yuan), the number of remorsements of the unknown number is all, and the two sides of the equal sign are integer leaks, and such an equation is called a one-dimensional equation. The "yuan" here refers to an unknown number, and a yuan is an unknown number; "Times" refers to the number of times that an item with an unknown number is used, and the number of times a cherry blossom search is correct, that is, the number of times an unknown number is correct.

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Can it be replaced with an equation-based solution?

Good. 60x+120-60x=90x-60x120=30xx=4Okay.

Summary. Pro, the solution equation is as follows: 60x+30x=18090x=18090x=90=180 90x=2

60x+30x=180 to solve the equation.

Pro, the solution equation is as follows: 60x+30x=18090x=18090x=90=180 90x=2

The following is the principle followed in solving the equation: both sides of the equation are added, subtracted, multiplied and divided by the same number at the same time, and the equation remains unchanged.

There are two ways to solve equations. One is the addition, subtraction, and elimination method, and the other is the shift method.

Unraveling the rough rock: stool Shen brackets: 120x-80x-(80x30) Chunyu 60=20120-80)x=20+40

40x=60

x=60÷40=3/2

Solution: Go to the bridge and raise brackets.

120x-80x-40=20

Shifting masking items merge similar items.

40x=60

Zhishu digitization 1: x=

This is a one-dimensional equation.

The question can be answered like this, as shown below.

Solution: Quietly. 60+20)x＝120

80x＝120

x＝120÷80

x The extended information is shown below.

The value of an unknown that equalizes the left and right sides of the equation is called the solution of the equation. The process of finding the solution of an equation is called solving an equation.

An equation that must contain an equation of unknowns is called an equation. An equation doesn't have to be an equation, an equation has to be an equation.

2.The value of the unknown that makes the equation true is 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.Verification: After solving the equation, verification is required. 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).