3r-15=45-2r

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Solution for 3r-15=45-2r equation:


Simplifying
3r + -15 = 45 + -2r

Reorder the terms:
-15 + 3r = 45 + -2r

Solving
-15 + 3r = 45 + -2r

Solving for variable 'r'.

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

Add '2r' to each side of the equation.
-15 + 3r + 2r = 45 + -2r + 2r

Combine like terms: 3r + 2r = 5r
-15 + 5r = 45 + -2r + 2r

Combine like terms: -2r + 2r = 0
-15 + 5r = 45 + 0
-15 + 5r = 45

Add '15' to each side of the equation.
-15 + 15 + 5r = 45 + 15

Combine like terms: -15 + 15 = 0
0 + 5r = 45 + 15
5r = 45 + 15

Combine like terms: 45 + 15 = 60
5r = 60

Divide each side by '5'.
r = 12

Simplifying
r = 12

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