8(r-4)=56

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Solution for 8(r-4)=56 equation: 



8(r-4)=56

We move all terms to the left:

8(r-4)-(56)=0

We multiply parentheses

8r-32-56=0

We add all the numbers together, and all the variables

8r-88=0

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

8r=88

r=88/8

r=11

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