2(r+1)=9

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


Simplifying
2(r + 1) = 9

Reorder the terms:
2(1 + r) = 9
(1 * 2 + r * 2) = 9
(2 + 2r) = 9

Solving
2 + 2r = 9

Solving for variable 'r'.

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

Add '-2' to each side of the equation.
2 + -2 + 2r = 9 + -2

Combine like terms: 2 + -2 = 0
0 + 2r = 9 + -2
2r = 9 + -2

Combine like terms: 9 + -2 = 7
2r = 7

Divide each side by '2'.
r = 3.5

Simplifying
r = 3.5

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