5r-(-7r-2)=86

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Solution for 5r-(-7r-2)=86 equation:


Simplifying
5r + -1(-7r + -2) = 86

Reorder the terms:
5r + -1(-2 + -7r) = 86
5r + (-2 * -1 + -7r * -1) = 86
5r + (2 + 7r) = 86

Reorder the terms:
2 + 5r + 7r = 86

Combine like terms: 5r + 7r = 12r
2 + 12r = 86

Solving
2 + 12r = 86

Solving for variable 'r'.

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

Add '-2' to each side of the equation.
2 + -2 + 12r = 86 + -2

Combine like terms: 2 + -2 = 0
0 + 12r = 86 + -2
12r = 86 + -2

Combine like terms: 86 + -2 = 84
12r = 84

Divide each side by '12'.
r = 7

Simplifying
r = 7

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