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

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


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

Reorder the terms:
2(7 + r) + -1 = -7
(7 * 2 + r * 2) + -1 = -7
(14 + 2r) + -1 = -7

Reorder the terms:
14 + -1 + 2r = -7

Combine like terms: 14 + -1 = 13
13 + 2r = -7

Solving
13 + 2r = -7

Solving for variable 'r'.

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

Add '-13' to each side of the equation.
13 + -13 + 2r = -7 + -13

Combine like terms: 13 + -13 = 0
0 + 2r = -7 + -13
2r = -7 + -13

Combine like terms: -7 + -13 = -20
2r = -20

Divide each side by '2'.
r = -10

Simplifying
r = -10

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