7b=2b-40

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Solution for 7b=2b-40 equation: 



7b=2b-40

We move all terms to the left:

7b-(2b-40)=0

We get rid of parentheses

7b-2b+40=0

We add all the numbers together, and all the variables

5b+40=0

We move all terms containing b to the left, all other terms to the right

5b=-40

b=-40/5

b=-8

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