1+x+7x=-15

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Solution for 1+x+7x=-15 equation: 



1+x+7x=-15

We move all terms to the left:

1+x+7x-(-15)=0

We add all the numbers together, and all the variables

8x+16=0

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

8x=-16

x=-16/8

x=-2

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