3+2r+1=15

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Solution for 3+2r+1=15 equation: 


Simplifying
3 + 2r + 1 = 15

Reorder the terms:
3 + 1 + 2r = 15

Combine like terms: 3 + 1 = 4
4 + 2r = 15

Solving
4 + 2r = 15

Solving for variable 'r'.

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

Add '-4' to each side of the equation.
4 + -4 + 2r = 15 + -4

Combine like terms: 4 + -4 = 0
0 + 2r = 15 + -4
2r = 15 + -4

Combine like terms: 15 + -4 = 11
2r = 11

Divide each side by '2'.
r = 5.5

Simplifying
r = 5.5

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