18=-5r+9r

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Solution for 18=-5r+9r equation:


Simplifying
18 = -5r + 9r

Combine like terms: -5r + 9r = 4r
18 = 4r

Solving
18 = 4r

Solving for variable 'r'.

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

Add '-4r' to each side of the equation.
18 + -4r = 4r + -4r

Combine like terms: 4r + -4r = 0
18 + -4r = 0

Add '-18' to each side of the equation.
18 + -18 + -4r = 0 + -18

Combine like terms: 18 + -18 = 0
0 + -4r = 0 + -18
-4r = 0 + -18

Combine like terms: 0 + -18 = -18
-4r = -18

Divide each side by '-4'.
r = 4.5

Simplifying
r = 4.5

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