9+17r-1=9r+128-7r

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Solution for 9+17r-1=9r+128-7r equation:


Simplifying
9 + 17r + -1 = 9r + 128 + -7r

Reorder the terms:
9 + -1 + 17r = 9r + 128 + -7r

Combine like terms: 9 + -1 = 8
8 + 17r = 9r + 128 + -7r

Reorder the terms:
8 + 17r = 128 + 9r + -7r

Combine like terms: 9r + -7r = 2r
8 + 17r = 128 + 2r

Solving
8 + 17r = 128 + 2r

Solving for variable 'r'.

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

Add '-2r' to each side of the equation.
8 + 17r + -2r = 128 + 2r + -2r

Combine like terms: 17r + -2r = 15r
8 + 15r = 128 + 2r + -2r

Combine like terms: 2r + -2r = 0
8 + 15r = 128 + 0
8 + 15r = 128

Add '-8' to each side of the equation.
8 + -8 + 15r = 128 + -8

Combine like terms: 8 + -8 = 0
0 + 15r = 128 + -8
15r = 128 + -8

Combine like terms: 128 + -8 = 120
15r = 120

Divide each side by '15'.
r = 8

Simplifying
r = 8

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