7a+16+3a=-4

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Solution for 7a+16+3a=-4 equation: 



7a+16+3a=-4

We move all terms to the left:

7a+16+3a-(-4)=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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