-2=2(r-10)-4

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Solution for -2=2(r-10)-4 equation: 



-2=2(r-10)-4

We move all terms to the left:

-2-(2(r-10)-4)=0



We calculate terms in parentheses: -(2(r-10)-4), so:

2(r-10)-4

We multiply parentheses

2r-20-4

We add all the numbers together, and all the variables

2r-24

Back to the equation:

-(2r-24)



We get rid of parentheses

-2r+24-2=0

We add all the numbers together, and all the variables

-2r+22=0

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

-2r=-22

r=-22/-2

r=+11

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