9-5r+7=7r-8

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Solution for 9-5r+7=7r-8 equation:


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

Reorder the terms:
9 + 7 + -5r = 7r + -8

Combine like terms: 9 + 7 = 16
16 + -5r = 7r + -8

Reorder the terms:
16 + -5r = -8 + 7r

Solving
16 + -5r = -8 + 7r

Solving for variable 'r'.

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

Add '-7r' to each side of the equation.
16 + -5r + -7r = -8 + 7r + -7r

Combine like terms: -5r + -7r = -12r
16 + -12r = -8 + 7r + -7r

Combine like terms: 7r + -7r = 0
16 + -12r = -8 + 0
16 + -12r = -8

Add '-16' to each side of the equation.
16 + -16 + -12r = -8 + -16

Combine like terms: 16 + -16 = 0
0 + -12r = -8 + -16
-12r = -8 + -16

Combine like terms: -8 + -16 = -24
-12r = -24

Divide each side by '-12'.
r = 2

Simplifying
r = 2

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