-x-4=-9x-84

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Solution for -x-4=-9x-84 equation: 



-x-4=-9x-84

We move all terms to the left:

-x-4-(-9x-84)=0

We add all the numbers together, and all the variables

-1x-(-9x-84)-4=0

We get rid of parentheses

-1x+9x+84-4=0

We add all the numbers together, and all the variables

8x+80=0

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

8x=-80

x=-80/8

x=-10

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