2r+9=r+15

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Solution for 2r+9=r+15 equation:


Simplifying
2r + 9 = r + 15

Reorder the terms:
9 + 2r = r + 15

Reorder the terms:
9 + 2r = 15 + r

Solving
9 + 2r = 15 + r

Solving for variable 'r'.

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

Add '-1r' to each side of the equation.
9 + 2r + -1r = 15 + r + -1r

Combine like terms: 2r + -1r = 1r
9 + 1r = 15 + r + -1r

Combine like terms: r + -1r = 0
9 + 1r = 15 + 0
9 + 1r = 15

Add '-9' to each side of the equation.
9 + -9 + 1r = 15 + -9

Combine like terms: 9 + -9 = 0
0 + 1r = 15 + -9
1r = 15 + -9

Combine like terms: 15 + -9 = 6
1r = 6

Divide each side by '1'.
r = 6

Simplifying
r = 6

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