12r-15=3(2r+3)

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Solution for 12r-15=3(2r+3) equation:


Simplifying
12r + -15 = 3(2r + 3)

Reorder the terms:
-15 + 12r = 3(2r + 3)

Reorder the terms:
-15 + 12r = 3(3 + 2r)
-15 + 12r = (3 * 3 + 2r * 3)
-15 + 12r = (9 + 6r)

Solving
-15 + 12r = 9 + 6r

Solving for variable 'r'.

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

Add '-6r' to each side of the equation.
-15 + 12r + -6r = 9 + 6r + -6r

Combine like terms: 12r + -6r = 6r
-15 + 6r = 9 + 6r + -6r

Combine like terms: 6r + -6r = 0
-15 + 6r = 9 + 0
-15 + 6r = 9

Add '15' to each side of the equation.
-15 + 15 + 6r = 9 + 15

Combine like terms: -15 + 15 = 0
0 + 6r = 9 + 15
6r = 9 + 15

Combine like terms: 9 + 15 = 24
6r = 24

Divide each side by '6'.
r = 4

Simplifying
r = 4

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