-4(1-3r)=-100

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Solution for -4(1-3r)=-100 equation: 


Simplifying
-4(1 + -3r) = -100
(1 * -4 + -3r * -4) = -100
(-4 + 12r) = -100

Solving
-4 + 12r = -100

Solving for variable 'r'.

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

Add '4' to each side of the equation.
-4 + 4 + 12r = -100 + 4

Combine like terms: -4 + 4 = 0
0 + 12r = -100 + 4
12r = -100 + 4

Combine like terms: -100 + 4 = -96
12r = -96

Divide each side by '12'.
r = -8

Simplifying
r = -8

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