-7=-3a-4a

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



-7=-3a-4a

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(-7a)-7=0

We get rid of parentheses

7a-7=0

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

7a=7

a=7/7

a=1

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