-3r+7(-1-4r)=117

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Solution for -3r+7(-1-4r)=117 equation:


Simplifying
-3r + 7(-1 + -4r) = 117
-3r + (-1 * 7 + -4r * 7) = 117
-3r + (-7 + -28r) = 117

Reorder the terms:
-7 + -3r + -28r = 117

Combine like terms: -3r + -28r = -31r
-7 + -31r = 117

Solving
-7 + -31r = 117

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 + -31r = 117 + 7

Combine like terms: -7 + 7 = 0
0 + -31r = 117 + 7
-31r = 117 + 7

Combine like terms: 117 + 7 = 124
-31r = 124

Divide each side by '-31'.
r = -4

Simplifying
r = -4

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