Question about equations with variables on both sides

So here's the question.

20-7x= 6x-6

 

On khan academy, the tutor said that you should subtract 20. But aren't you sopposed to add 7x first??
in Algebra 2 Answers by

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1 Answer

20-7x=6x-6

Method 1

Add -20 to both sides

20-7x-20=6x-6-20

-7x=6x-26

Add -6x to both sides

-7x-6x=6x-26-6x

-13x=-26

Divide both sides by -13

-13x/-13=-26/-13

x=2

Method 2

20-7x=6x-6

20-7x+7x=6x-6+7x

20=13x-6

20+6=13x-6+6

26=13x

13x=26

13x/13=26/13

x=2

The answer will be the same. Do you see how it works?

 

by Level 8 User (32.3k points)

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