6(1-3r)=-138

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Solution for 6(1-3r)=-138 equation: 


Simplifying
6(1 + -3r) = -138
(1 * 6 + -3r * 6) = -138
(6 + -18r) = -138

Solving
6 + -18r = -138

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-6' to each side of the equation.
6 + -6 + -18r = -138 + -6

Combine like terms: 6 + -6 = 0
0 + -18r = -138 + -6
-18r = -138 + -6

Combine like terms: -138 + -6 = -144
-18r = -144

Divide each side by '-18'.
r = 8

Simplifying
r = 8

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