7a+15=2a-25

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Solution for 7a+15=2a-25 equation: 



7a+15=2a-25

We move all terms to the left:

7a+15-(2a-25)=0

We get rid of parentheses

7a-2a+25+15=0

We add all the numbers together, and all the variables

5a+40=0

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

5a=-40

a=-40/5

a=-8

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