-3(1-7r)=-150

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Solution for -3(1-7r)=-150 equation: 


Simplifying
-3(1 + -7r) = -150
(1 * -3 + -7r * -3) = -150
(-3 + 21r) = -150

Solving
-3 + 21r = -150

Solving for variable 'r'.

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

Add '3' to each side of the equation.
-3 + 3 + 21r = -150 + 3

Combine like terms: -3 + 3 = 0
0 + 21r = -150 + 3
21r = -150 + 3

Combine like terms: -150 + 3 = -147
21r = -147

Divide each side by '21'.
r = -7

Simplifying
r = -7

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