7a+3a=2a-4

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Solution for 7a+3a=2a-4 equation: 



7a+3a=2a-4

We move all terms to the left:

7a+3a-(2a-4)=0

We add all the numbers together, and all the variables

10a-(2a-4)=0

We get rid of parentheses

10a-2a+4=0

We add all the numbers together, and all the variables

8a+4=0

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

8a=-4

a=-4/8

a=-1/2

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