18=8r+1r

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Solution for 18=8r+1r equation:


Simplifying
18 = 8r + 1r

Combine like terms: 8r + 1r = 9r
18 = 9r

Solving
18 = 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.
18 + -9r = 9r + -9r

Combine like terms: 9r + -9r = 0
18 + -9r = 0

Add '-18' to each side of the equation.
18 + -18 + -9r = 0 + -18

Combine like terms: 18 + -18 = 0
0 + -9r = 0 + -18
-9r = 0 + -18

Combine like terms: 0 + -18 = -18
-9r = -18

Divide each side by '-9'.
r = 2

Simplifying
r = 2

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