7r+12-5r=15

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Solution for 7r+12-5r=15 equation:


Simplifying
7r + 12 + -5r = 15

Reorder the terms:
12 + 7r + -5r = 15

Combine like terms: 7r + -5r = 2r
12 + 2r = 15

Solving
12 + 2r = 15

Solving for variable 'r'.

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

Add '-12' to each side of the equation.
12 + -12 + 2r = 15 + -12

Combine like terms: 12 + -12 = 0
0 + 2r = 15 + -12
2r = 15 + -12

Combine like terms: 15 + -12 = 3
2r = 3

Divide each side by '2'.
r = 1.5

Simplifying
r = 1.5

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