15=7+3r

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Solution for 15=7+3r equation:


Simplifying
15 = 7 + 3r

Solving
15 = 7 + 3r

Solving for variable 'r'.

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

Add '-3r' to each side of the equation.
15 + -3r = 7 + 3r + -3r

Combine like terms: 3r + -3r = 0
15 + -3r = 7 + 0
15 + -3r = 7

Add '-15' to each side of the equation.
15 + -15 + -3r = 7 + -15

Combine like terms: 15 + -15 = 0
0 + -3r = 7 + -15
-3r = 7 + -15

Combine like terms: 7 + -15 = -8
-3r = -8

Divide each side by '-3'.
r = 2.666666667

Simplifying
r = 2.666666667

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