9r-2(2r+9)=0

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Solution for 9r-2(2r+9)=0 equation:


Simplifying
9r + -2(2r + 9) = 0

Reorder the terms:
9r + -2(9 + 2r) = 0
9r + (9 * -2 + 2r * -2) = 0
9r + (-18 + -4r) = 0

Reorder the terms:
-18 + 9r + -4r = 0

Combine like terms: 9r + -4r = 5r
-18 + 5r = 0

Solving
-18 + 5r = 0

Solving for variable 'r'.

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

Add '18' to each side of the equation.
-18 + 18 + 5r = 0 + 18

Combine like terms: -18 + 18 = 0
0 + 5r = 0 + 18
5r = 0 + 18

Combine like terms: 0 + 18 = 18
5r = 18

Divide each side by '5'.
r = 3.6

Simplifying
r = 3.6

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