10(r-7)-7=-87

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Solution for 10(r-7)-7=-87 equation: 



10(r-7)-7=-87

We move all terms to the left:

10(r-7)-7-(-87)=0

We add all the numbers together, and all the variables

10(r-7)+80=0

We multiply parentheses

10r-70+80=0

We add all the numbers together, and all the variables

10r+10=0

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

10r=-10

r=-10/10

r=-1

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