2(2r-9)=2(-4r+9)

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Solution for 2(2r-9)=2(-4r+9) equation:


Simplifying
2(2r + -9) = 2(-4r + 9)

Reorder the terms:
2(-9 + 2r) = 2(-4r + 9)
(-9 * 2 + 2r * 2) = 2(-4r + 9)
(-18 + 4r) = 2(-4r + 9)

Reorder the terms:
-18 + 4r = 2(9 + -4r)
-18 + 4r = (9 * 2 + -4r * 2)
-18 + 4r = (18 + -8r)

Solving
-18 + 4r = 18 + -8r

Solving for variable 'r'.

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

Add '8r' to each side of the equation.
-18 + 4r + 8r = 18 + -8r + 8r

Combine like terms: 4r + 8r = 12r
-18 + 12r = 18 + -8r + 8r

Combine like terms: -8r + 8r = 0
-18 + 12r = 18 + 0
-18 + 12r = 18

Add '18' to each side of the equation.
-18 + 18 + 12r = 18 + 18

Combine like terms: -18 + 18 = 0
0 + 12r = 18 + 18
12r = 18 + 18

Combine like terms: 18 + 18 = 36
12r = 36

Divide each side by '12'.
r = 3

Simplifying
r = 3

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