-7=-10+r/2

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Solution for -7=-10+r/2 equation: 



-7=-10+r/2

We move all terms to the left:

-7-(-10+r/2)=0

We add all the numbers together, and all the variables

-(r/2-10)-7=0

We get rid of parentheses

-r/2+10-7=0

We multiply all the terms by the denominator


-r+10*2-7*2=0

We add all the numbers together, and all the variables

-1r+6=0

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

-r=-6

r=-6/-1

r=+6

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