7x+7=-8x

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Solution for 7x+7=-8x equation: 



7x+7=-8x

We move all terms to the left:

7x+7-(-8x)=0

We get rid of parentheses

7x+8x+7=0

We add all the numbers together, and all the variables

15x+7=0

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

15x=-7

x=-7/15

x=-7/15

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