r-23=9r-7

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Solution for r-23=9r-7 equation:


Simplifying
r + -23 = 9r + -7

Reorder the terms:
-23 + r = 9r + -7

Reorder the terms:
-23 + r = -7 + 9r

Solving
-23 + r = -7 + 9r

Solving for variable 'r'.

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

Add '-9r' to each side of the equation.
-23 + r + -9r = -7 + 9r + -9r

Combine like terms: r + -9r = -8r
-23 + -8r = -7 + 9r + -9r

Combine like terms: 9r + -9r = 0
-23 + -8r = -7 + 0
-23 + -8r = -7

Add '23' to each side of the equation.
-23 + 23 + -8r = -7 + 23

Combine like terms: -23 + 23 = 0
0 + -8r = -7 + 23
-8r = -7 + 23

Combine like terms: -7 + 23 = 16
-8r = 16

Divide each side by '-8'.
r = -2

Simplifying
r = -2

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