-(r-9)+2r=-(r-9)

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Solution for -(r-9)+2r=-(r-9) equation:


Simplifying
-1(r + -9) + 2r = -1(r + -9)

Reorder the terms:
-1(-9 + r) + 2r = -1(r + -9)
(-9 * -1 + r * -1) + 2r = -1(r + -9)
(9 + -1r) + 2r = -1(r + -9)

Combine like terms: -1r + 2r = 1r
9 + 1r = -1(r + -9)

Reorder the terms:
9 + 1r = -1(-9 + r)
9 + 1r = (-9 * -1 + r * -1)
9 + 1r = (9 + -1r)

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

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

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

Solving
1r = -1r

Solving for variable 'r'.

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

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

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

Combine like terms: -1r + r = 0
2r = 0

Divide each side by '2'.
r = 0

Simplifying
r = 0

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