9r-28=12+r

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Solution for 9r-28=12+r equation:


Simplifying
9r + -28 = 12 + r

Reorder the terms:
-28 + 9r = 12 + r

Solving
-28 + 9r = 12 + r

Solving for variable 'r'.

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

Add '-1r' to each side of the equation.
-28 + 9r + -1r = 12 + r + -1r

Combine like terms: 9r + -1r = 8r
-28 + 8r = 12 + r + -1r

Combine like terms: r + -1r = 0
-28 + 8r = 12 + 0
-28 + 8r = 12

Add '28' to each side of the equation.
-28 + 28 + 8r = 12 + 28

Combine like terms: -28 + 28 = 0
0 + 8r = 12 + 28
8r = 12 + 28

Combine like terms: 12 + 28 = 40
8r = 40

Divide each side by '8'.
r = 5

Simplifying
r = 5

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