4=2(r-7)

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



4=2(r-7)

We move all terms to the left:

4-(2(r-7))=0



We calculate terms in parentheses: -(2(r-7)), so:

2(r-7)

We multiply parentheses

2r-14

Back to the equation:

-(2r-14)



We get rid of parentheses

-2r+14+4=0

We add all the numbers together, and all the variables

-2r+18=0

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

-2r=-18

r=-18/-2

r=+9

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