15=-7+r

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Solution for 15=-7+r equation:


15=-7+r

We simplify the equation to the form, which is simple to understand 
15=-7+r

We move all terms containing r to the left and all other terms to the right. 
-1r=-7-15

We simplify left and right side of the equation. 
-1r=-22

We divide both sides of the equation by -01 to get r. 
r=22

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