7a-8=2a+a+4

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Solution for 7a-8=2a+a+4 equation: 



7a-8=2a+a+4

We move all terms to the left:

7a-8-(2a+a+4)=0

We add all the numbers together, and all the variables

7a-(3a+4)-8=0

We get rid of parentheses

7a-3a-4-8=0

We add all the numbers together, and all the variables

4a-12=0

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

4a=12

a=12/4

a=3

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