100=-6r-4(r-5)

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Solution for 100=-6r-4(r-5) equation: 



100=-6r-4(r-5)

We move all terms to the left:

100-(-6r-4(r-5))=0



We calculate terms in parentheses: -(-6r-4(r-5)), so:

-6r-4(r-5)

We multiply parentheses

-6r-4r+20

We add all the numbers together, and all the variables

-10r+20

Back to the equation:

-(-10r+20)



We get rid of parentheses

10r-20+100=0

We add all the numbers together, and all the variables

10r+80=0

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

10r=-80

r=-80/10

r=-8

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