12r-15=7r

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Solution for 12r-15=7r equation:


Simplifying
12r + -15 = 7r

Reorder the terms:
-15 + 12r = 7r

Solving
-15 + 12r = 7r

Solving for variable 'r'.

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

Add '-7r' to each side of the equation.
-15 + 12r + -7r = 7r + -7r

Combine like terms: 12r + -7r = 5r
-15 + 5r = 7r + -7r

Combine like terms: 7r + -7r = 0
-15 + 5r = 0

Add '15' to each side of the equation.
-15 + 15 + 5r = 0 + 15

Combine like terms: -15 + 15 = 0
0 + 5r = 0 + 15
5r = 0 + 15

Combine like terms: 0 + 15 = 15
5r = 15

Divide each side by '5'.
r = 3

Simplifying
r = 3

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