-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 add all the numbers together, and all the variables

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

We get rid of parentheses

-r/7+2-4=0

We multiply all the terms by the denominator


-r+2*7-4*7=0

We add all the numbers together, and all the variables

-1r-14=0

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

-r=14

r=14/-1

r=-14

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