-9(5-r)=18

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Solution for -9(5-r)=18 equation: 


Simplifying
-9(5 + -1r) = 18
(5 * -9 + -1r * -9) = 18
(-45 + 9r) = 18

Solving
-45 + 9r = 18

Solving for variable 'r'.

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

Add '45' to each side of the equation.
-45 + 45 + 9r = 18 + 45

Combine like terms: -45 + 45 = 0
0 + 9r = 18 + 45
9r = 18 + 45

Combine like terms: 18 + 45 = 63
9r = 63

Divide each side by '9'.
r = 7

Simplifying
r = 7

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