-9r+7=3-(8*r+8)

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Solution for -9r+7=3-(8*r+8) equation:


Simplifying
-9r + 7 = 3 + -1(8r + 8)

Reorder the terms:
7 + -9r = 3 + -1(8r + 8)

Reorder the terms:
7 + -9r = 3 + -1(8 + 8r)
7 + -9r = 3 + (8 * -1 + 8r * -1)
7 + -9r = 3 + (-8 + -8r)

Combine like terms: 3 + -8 = -5
7 + -9r = -5 + -8r

Solving
7 + -9r = -5 + -8r

Solving for variable 'r'.

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

Add '8r' to each side of the equation.
7 + -9r + 8r = -5 + -8r + 8r

Combine like terms: -9r + 8r = -1r
7 + -1r = -5 + -8r + 8r

Combine like terms: -8r + 8r = 0
7 + -1r = -5 + 0
7 + -1r = -5

Add '-7' to each side of the equation.
7 + -7 + -1r = -5 + -7

Combine like terms: 7 + -7 = 0
0 + -1r = -5 + -7
-1r = -5 + -7

Combine like terms: -5 + -7 = -12
-1r = -12

Divide each side by '-1'.
r = 12

Simplifying
r = 12

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