3(5-r)=18

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Solution for 3(5-r)=18 equation: 


Simplifying
3(5 + -1r) = 18
(5 * 3 + -1r * 3) = 18
(15 + -3r) = 18

Solving
15 + -3r = 18

Solving for variable 'r'.

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

Add '-15' to each side of the equation.
15 + -15 + -3r = 18 + -15

Combine like terms: 15 + -15 = 0
0 + -3r = 18 + -15
-3r = 18 + -15

Combine like terms: 18 + -15 = 3
-3r = 3

Divide each side by '-3'.
r = -1

Simplifying
r = -1

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