-3(1-5r)+7=124

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Solution for -3(1-5r)+7=124 equation:


Simplifying
-3(1 + -5r) + 7 = 124
(1 * -3 + -5r * -3) + 7 = 124
(-3 + 15r) + 7 = 124

Reorder the terms:
-3 + 7 + 15r = 124

Combine like terms: -3 + 7 = 4
4 + 15r = 124

Solving
4 + 15r = 124

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 + 15r = 124 + -4

Combine like terms: 4 + -4 = 0
0 + 15r = 124 + -4
15r = 124 + -4

Combine like terms: 124 + -4 = 120
15r = 120

Divide each side by '15'.
r = 8

Simplifying
r = 8

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