2 A 7 93 How to do 7 plus a half 42 How to answer?

Solve the equation to calculate 2x-7=93

Problem solving idea: In the process of solving the equation, it is necessary to merge the same terms, merge the unknown terms and constant terms respectively, and finally turn the coefficients of the unknown terms into 1

Problem solving process: 2x-7=93

x=(93+7)÷2

x=50 check: 2 50-7=93

Extended Information - > Calculation Results: Four rules of operation (calculation in order, multiplication and division first and then addition and subtraction, parentheses before parentheses, and multiplication before power) that is, off-form operations (recursive equation calculations) need to be carried out under the premise of this principle. Problem solving process:

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

The solution is as follows: 2x-7=93

2x=93+7

2x=100

x=50 Boost Boost:

Many students like the joy of overcoming difficult problems, so they show the spirit of not dying until the Yellow River, sometimes spending a class time to overcome a difficult problem, and have a great sense of achievement.

The problem is that the efficiency of tackling one problem in one class is really too low. A master learner would never do that.

Remember: never spend a single lesson solving a difficult problem, which is a major cause of inefficiency. If you use one class to solve a problem, what should you do with other topics, do you have enough time, and more importantly, do you really gain a lot from this topic?

Expert's strategy: If a question still can't be solved after 10 minutes, then just look at the answer or wait for the teacher to explain. Because, being able to do this question, and being able to draw inferences from one another, and being able to make a full summary is the most important purpose.

After reading the answer, or listening to the explanation, you must spend more time to summarize: why did I not answer this question, the breakthrough is in**, why didn't I find it, which key words trigger the solution idea, how should I establish conditioning, so that I can see these vocabulary information again in the future and quickly find the relevant breakthrough. Remember, that's the most important job.

The inductive summary of mathematics is too important. Top students, they spend 5 minutes doing a problem, and then they will spend 10-15 minutes to make an inductive summary and write a solution note.

Inductive summary is actually the problem solving association, that is, writing the solution notes, and summarizing the "conditioned reflex". In order to improve the sensitivity to key words, we can quickly establish conditioned reflexes and find a breakthrough in solving problems through key words, which is the so-called problem-solving association. This is a compulsory course for math masters.

Summarizing and summarizing is all conditioned reflexes, that is, what I see, I have to associate with something, and then break through this problem in one fell swoop. For example, when I see the word "integer", I think of mathematical induction. 0

According to the title, it can be known.

2x - 7 = 93

2x = 93 + 7

2x = 100

x = 50

Solution: x=50

The unknowns are placed on one side of the equation, and the unknowns are placed on the other side of the equation, i.e. 3x=2x+60, 3x-2x=60, x=60. Thank you.

3x=2x+60.

3x=2x+60

Solution: 3x-2x=60 - one addition = sum - another addition.

x=60

Solution: Subtract 2x from both sides of the equation, 3x-2x = 2x-2x+60

x=60

Summary. How do you answer 7 plus 1/2 = 42?

Dear, remember to change the symbol when moving items.

7 + 2 6 = how much.

Hello, there is addition in the equation and multiplication according to the rules of operation, there are parentheses in the first parentheses, then multiplication and division, and finally addition and subtraction, because there are no hand loss brackets in this question, so we calculate multiplication first, and then calculate addition 7 + 2 6 = 7 + 12 = 19

Hello, 37-5 = 2 +9, after calculation, we get x=4. The analysis is as follows: 37 9=2x+5x, 27=4x, so, x=4 The key to solving this boring guessing problem is to move the terms, move the same terms together with the untyped, and then simplify the formula to get the answer.

I hope mine is helpful to you and have a great day! In the lower left corner, remember to praise the <>