3(5r+15)=10(3r-9)

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Solution for 3(5r+15)=10(3r-9) equation:


Simplifying
3(5r + 15) = 10(3r + -9)

Reorder the terms:
3(15 + 5r) = 10(3r + -9)
(15 * 3 + 5r * 3) = 10(3r + -9)
(45 + 15r) = 10(3r + -9)

Reorder the terms:
45 + 15r = 10(-9 + 3r)
45 + 15r = (-9 * 10 + 3r * 10)
45 + 15r = (-90 + 30r)

Solving
45 + 15r = -90 + 30r

Solving for variable 'r'.

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

Add '-30r' to each side of the equation.
45 + 15r + -30r = -90 + 30r + -30r

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

Combine like terms: 30r + -30r = 0
45 + -15r = -90 + 0
45 + -15r = -90

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

Combine like terms: 45 + -45 = 0
0 + -15r = -90 + -45
-15r = -90 + -45

Combine like terms: -90 + -45 = -135
-15r = -135

Divide each side by '-15'.
r = 9

Simplifying
r = 9

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