5r-21=-3(7+4r)

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Solution for 5r-21=-3(7+4r) equation:


5r-21=-3(7+4r)

We simplify the equation to the form, which is simple to understand 
5r-21=-3(7+4r)

Reorder the terms in parentheses
5r-21=+(-21-12r)

Remove unnecessary parentheses
+5r-21=-21-12r

We move all terms containing r to the left and all other terms to the right. 
+5r+12r=-21+21

We simplify left and right side of the equation. 
+17r=0

We divide both sides of the equation by 17 to get r. 
r=0

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