9[7-(9-9r)]=

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Solution for 9[7-(9-9r)]= equation:


Simplifying
9[7 + -1(9 + -9r)] = 0
9[7 + (9 * -1 + -9r * -1)] = 0
9[7 + (-9 + 9r)] = 0

Combine like terms: 7 + -9 = -2
9[-2 + 9r] = 0
[-2 * 9 + 9r * 9] = 0
[-18 + 81r] = 0

Solving
-18 + 81r = 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 + 81r = 0 + 18

Combine like terms: -18 + 18 = 0
0 + 81r = 0 + 18
81r = 0 + 18

Combine like terms: 0 + 18 = 18
81r = 18

Divide each side by '81'.
r = 0.2222222222

Simplifying
r = 0.2222222222

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