-2r+9=-3(2+21)+3

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Solution for -2r+9=-3(2+21)+3 equation:


-2r+9=-3(2+21)+3

We simplify the equation to the form, which is simple to understand 
-2r+9=-3(2+21)+3

Simplifying terms in parentheses
-2r+9=-3*(+23)+3

Reorder the terms in parentheses
-2r+9=+(-69)+3

Remove unnecessary parentheses
-2r+9=-69+3

We move all terms containing r to the left and all other terms to the right. 
-2r=-69+3-9

We simplify left and right side of the equation. 
-2r=-75

We divide both sides of the equation by -2 to get r. 
r=37.5

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