3(5r+30)=15(3r-18)

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Solution for 3(5r+30)=15(3r-18) equation:


Simplifying
3(5r + 30) = 15(3r + -18)

Reorder the terms:
3(30 + 5r) = 15(3r + -18)
(30 * 3 + 5r * 3) = 15(3r + -18)
(90 + 15r) = 15(3r + -18)

Reorder the terms:
90 + 15r = 15(-18 + 3r)
90 + 15r = (-18 * 15 + 3r * 15)
90 + 15r = (-270 + 45r)

Solving
90 + 15r = -270 + 45r

Solving for variable 'r'.

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

Add '-45r' to each side of the equation.
90 + 15r + -45r = -270 + 45r + -45r

Combine like terms: 15r + -45r = -30r
90 + -30r = -270 + 45r + -45r

Combine like terms: 45r + -45r = 0
90 + -30r = -270 + 0
90 + -30r = -270

Add '-90' to each side of the equation.
90 + -90 + -30r = -270 + -90

Combine like terms: 90 + -90 = 0
0 + -30r = -270 + -90
-30r = -270 + -90

Combine like terms: -270 + -90 = -360
-30r = -360

Divide each side by '-30'.
r = 12

Simplifying
r = 12

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