1+2a+6a=-7

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Solution for 1+2a+6a=-7 equation: 



1+2a+6a=-7

We move all terms to the left:

1+2a+6a-(-7)=0

We add all the numbers together, and all the variables

8a+8=0

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

8a=-8

a=-8/8

a=-1

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