8=-(r+7)

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Solution for 8=-(r+7) equation: 


Simplifying
8 = -1(r + 7)

Reorder the terms:
8 = -1(7 + r)
8 = (7 * -1 + r * -1)
8 = (-7 + -1r)

Solving
8 = -7 + -1r

Solving for variable 'r'.

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

Add 'r' to each side of the equation.
8 + r = -7 + -1r + r

Combine like terms: -1r + r = 0
8 + r = -7 + 0
8 + r = -7

Add '-8' to each side of the equation.
8 + -8 + r = -7 + -8

Combine like terms: 8 + -8 = 0
0 + r = -7 + -8
r = -7 + -8

Combine like terms: -7 + -8 = -15
r = -15

Simplifying
r = -15

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