3(3-5r)-3=18

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


Simplifying
3(3 + -5r) + -3 = 18
(3 * 3 + -5r * 3) + -3 = 18
(9 + -15r) + -3 = 18

Reorder the terms:
9 + -3 + -15r = 18

Combine like terms: 9 + -3 = 6
6 + -15r = 18

Solving
6 + -15r = 18

Solving for variable 'r'.

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

Add '-6' to each side of the equation.
6 + -6 + -15r = 18 + -6

Combine like terms: 6 + -6 = 0
0 + -15r = 18 + -6
-15r = 18 + -6

Combine like terms: 18 + -6 = 12
-15r = 12

Divide each side by '-15'.
r = -0.8

Simplifying
r = -0.8

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