7(-3+9)-2r=

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Solution for 7(-3+9)-2r= equation:


7(-3+9)-2r=0

We simplify the equation to the form, which is simple to understand 
7(-3+9)-2r=0

Simplifying terms in parentheses
7*(+6)-2r=0

Reorder the terms in parentheses
+(+42)-2r=0

Remove unnecessary parentheses
+42-2r=0

We move all terms containing r to the left and all other terms to the right. 
-2r=0-42

We simplify left and right side of the equation. 
-2r=-42

We divide both sides of the equation by -2 to get r. 
r=21

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