(5+r)+10=21

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Solution for (5+r)+10=21 equation:


(5+r)+10=21

We simplify the equation to the form, which is simple to understand 
(5+r)+10=21

Remove unnecessary parentheses
5+r+10=21

We move all terms containing r to the left and all other terms to the right. 
+1r=+21-5-10

We simplify left and right side of the equation. 
+1r=+6

We divide both sides of the equation by 1 to get r. 
r=6

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