-5(3-r)=20

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Solution for -5(3-r)=20 equation:


-5(3-r)=20

We simplify the equation to the form, which is simple to understand 
-5(3-r)=20

Reorder the terms in parentheses
+(-15+5r)=20

Remove unnecessary parentheses
-15+5r=+20

We move all terms containing r to the left and all other terms to the right. 
+5r=+20+15

We simplify left and right side of the equation. 
+5r=+35

We divide both sides of the equation by 5 to get r. 
r=7

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