1a+5-3a=-7

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Solution for 1a+5-3a=-7 equation: 



1a+5-3a=-7

We move all terms to the left:

1a+5-3a-(-7)=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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