2r+9=7r-8+12r

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Solution for 2r+9=7r-8+12r equation:


Simplifying
2r + 9 = 7r + -8 + 12r

Reorder the terms:
9 + 2r = 7r + -8 + 12r

Reorder the terms:
9 + 2r = -8 + 7r + 12r

Combine like terms: 7r + 12r = 19r
9 + 2r = -8 + 19r

Solving
9 + 2r = -8 + 19r

Solving for variable 'r'.

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

Add '-19r' to each side of the equation.
9 + 2r + -19r = -8 + 19r + -19r

Combine like terms: 2r + -19r = -17r
9 + -17r = -8 + 19r + -19r

Combine like terms: 19r + -19r = 0
9 + -17r = -8 + 0
9 + -17r = -8

Add '-9' to each side of the equation.
9 + -9 + -17r = -8 + -9

Combine like terms: 9 + -9 = 0
0 + -17r = -8 + -9
-17r = -8 + -9

Combine like terms: -8 + -9 = -17
-17r = -17

Divide each side by '-17'.
r = 1

Simplifying
r = 1

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