5a+7=2a-8

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Solution for 5a+7=2a-8 equation: 



5a+7=2a-8

We move all terms to the left:

5a+7-(2a-8)=0

We get rid of parentheses

5a-2a+8+7=0

We add all the numbers together, and all the variables

3a+15=0

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

3a=-15

a=-15/3

a=-5

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