-7(1-8r)=-231

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Solution for -7(1-8r)=-231 equation: 


Simplifying
-7(1 + -8r) = -231
(1 * -7 + -8r * -7) = -231
(-7 + 56r) = -231

Solving
-7 + 56r = -231

Solving for variable 'r'.

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

Add '7' to each side of the equation.
-7 + 7 + 56r = -231 + 7

Combine like terms: -7 + 7 = 0
0 + 56r = -231 + 7
56r = -231 + 7

Combine like terms: -231 + 7 = -224
56r = -224

Divide each side by '56'.
r = -4

Simplifying
r = -4

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