-7(7r-1)-2=-142

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Solution for -7(7r-1)-2=-142 equation:


Simplifying
-7(7r + -1) + -2 = -142

Reorder the terms:
-7(-1 + 7r) + -2 = -142
(-1 * -7 + 7r * -7) + -2 = -142
(7 + -49r) + -2 = -142

Reorder the terms:
7 + -2 + -49r = -142

Combine like terms: 7 + -2 = 5
5 + -49r = -142

Solving
5 + -49r = -142

Solving for variable 'r'.

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

Add '-5' to each side of the equation.
5 + -5 + -49r = -142 + -5

Combine like terms: 5 + -5 = 0
0 + -49r = -142 + -5
-49r = -142 + -5

Combine like terms: -142 + -5 = -147
-49r = -147

Divide each side by '-49'.
r = 3

Simplifying
r = 3

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