2r+9+3=18

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Solution for 2r+9+3=18 equation:


Simplifying
2r + 9 + 3 = 18

Reorder the terms:
9 + 3 + 2r = 18

Combine like terms: 9 + 3 = 12
12 + 2r = 18

Solving
12 + 2r = 18

Solving for variable 'r'.

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

Add '-12' to each side of the equation.
12 + -12 + 2r = 18 + -12

Combine like terms: 12 + -12 = 0
0 + 2r = 18 + -12
2r = 18 + -12

Combine like terms: 18 + -12 = 6
2r = 6

Divide each side by '2'.
r = 3

Simplifying
r = 3

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