9(1+2r)=30

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Solution for 9(1+2r)=30 equation: 


Simplifying
9(1 + 2r) = 30
(1 * 9 + 2r * 9) = 30
(9 + 18r) = 30

Solving
9 + 18r = 30

Solving for variable 'r'.

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

Add '-9' to each side of the equation.
9 + -9 + 18r = 30 + -9

Combine like terms: 9 + -9 = 0
0 + 18r = 30 + -9
18r = 30 + -9

Combine like terms: 30 + -9 = 21
18r = 21

Divide each side by '18'.
r = 1.166666667

Simplifying
r = 1.166666667

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