3r-r+2=12

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Solution for 3r-r+2=12 equation:


Simplifying
3r + -1r + 2 = 12

Reorder the terms:
2 + 3r + -1r = 12

Combine like terms: 3r + -1r = 2r
2 + 2r = 12

Solving
2 + 2r = 12

Solving for variable 'r'.

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

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

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

Combine like terms: 12 + -2 = 10
2r = 10

Divide each side by '2'.
r = 5

Simplifying
r = 5

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