7r-18=8r-2(-4-6)

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Solution for 7r-18=8r-2(-4-6) equation: 



7r-18=8r-2(-4-6)

We move all terms to the left:

7r-18-(8r-2(-4-6))=0

We add all the numbers together, and all the variables

7r-(8r-2(-10))-18=0



We calculate terms in parentheses: -(8r-2(-10)), so:

8r-2(-10)

We add all the numbers together, and all the variables

8r+20

Back to the equation:

-(8r+20)



We get rid of parentheses

7r-8r-20-18=0

We add all the numbers together, and all the variables

-1r-38=0

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

-r=38

r=38/-1

r=-38

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