-9(1+7r)=31

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Solution for -9(1+7r)=31 equation: 


Simplifying
-9(1 + 7r) = 31
(1 * -9 + 7r * -9) = 31
(-9 + -63r) = 31

Solving
-9 + -63r = 31

Solving for variable 'r'.

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

Add '9' to each side of the equation.
-9 + 9 + -63r = 31 + 9

Combine like terms: -9 + 9 = 0
0 + -63r = 31 + 9
-63r = 31 + 9

Combine like terms: 31 + 9 = 40
-63r = 40

Divide each side by '-63'.
r = -0.6349206349

Simplifying
r = -0.6349206349

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