-7a-3a=20

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Solution for -7a-3a=20 equation: 



-7a-3a=20

We move all terms to the left:

-7a-3a-(20)=0

We add all the numbers together, and all the variables

-10a-20=0

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

-10a=20

a=20/-10

a=-2

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