7+2r-1=9r+12-6r

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Solution for 7+2r-1=9r+12-6r equation:


Simplifying
7 + 2r + -1 = 9r + 12 + -6r

Reorder the terms:
7 + -1 + 2r = 9r + 12 + -6r

Combine like terms: 7 + -1 = 6
6 + 2r = 9r + 12 + -6r

Reorder the terms:
6 + 2r = 12 + 9r + -6r

Combine like terms: 9r + -6r = 3r
6 + 2r = 12 + 3r

Solving
6 + 2r = 12 + 3r

Solving for variable 'r'.

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

Add '-3r' to each side of the equation.
6 + 2r + -3r = 12 + 3r + -3r

Combine like terms: 2r + -3r = -1r
6 + -1r = 12 + 3r + -3r

Combine like terms: 3r + -3r = 0
6 + -1r = 12 + 0
6 + -1r = 12

Add '-6' to each side of the equation.
6 + -6 + -1r = 12 + -6

Combine like terms: 6 + -6 = 0
0 + -1r = 12 + -6
-1r = 12 + -6

Combine like terms: 12 + -6 = 6
-1r = 6

Divide each side by '-1'.
r = -6

Simplifying
r = -6

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