84=2r+4(1-3r)

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Solution for 84=2r+4(1-3r) equation:


84=2r+4(1-3r)

We simplify the equation to the form, which is simple to understand 
84=2r+4(1-3r)

Reorder the terms in parentheses
84=2r+(+4-12r)

Remove unnecessary parentheses
+84=+2r+4-12r

We move all terms containing r to the left and all other terms to the right. 
-2r+12r=+4-84

We simplify left and right side of the equation. 
+10r=-80

We divide both sides of the equation by 10 to get r. 
r=-8

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