3(-7r)-3=3(-5r-12)

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Solution for 3(-7r)-3=3(-5r-12) equation:


3(-7r)-3=3(-5r-12)

We simplify the equation to the form, which is simple to understand 
3(-7r)-3=3(-5r-12)

Reorder the terms in parentheses
+(-21r)-3=3*(-5r-12)

Remove unnecessary parentheses
-21r-3=+3+*(-5r-12+)

Reorder the terms in parentheses
-21r-3=+(-15r-36)

Remove unnecessary parentheses
-21r-3=-15r-36

We move all terms containing r to the left and all other terms to the right. 
-21r+15r=-36+3

We simplify left and right side of the equation. 
-6r=-33

We divide both sides of the equation by -6 to get r. 
r=5.5

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