2a+5+a=a-7

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



2a+5+a=a-7

We move all terms to the left:

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

We add all the numbers together, and all the variables

3a-(a-7)+5=0

We get rid of parentheses

3a-a+7+5=0

We add all the numbers together, and all the variables

2a+12=0

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

2a=-12

a=-12/2

a=-6

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