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

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


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

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

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

Solving
18 + 2r = -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 + 2r + -8r = -18 + 8r + -8r

Combine like terms: 2r + -8r = -6r
18 + -6r = -18 + 8r + -8r

Combine like terms: 8r + -8r = 0
18 + -6r = -18 + 0
18 + -6r = -18

Add '-18' to each side of the equation.
18 + -18 + -6r = -18 + -18

Combine like terms: 18 + -18 = 0
0 + -6r = -18 + -18
-6r = -18 + -18

Combine like terms: -18 + -18 = -36
-6r = -36

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

Simplifying
r = 6

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