15=3-2r

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Solution for 15=3-2r equation:


Simplifying
15 = 3 + -2r

Solving
15 = 3 + -2r

Solving for variable 'r'.

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

Add '2r' to each side of the equation.
15 + 2r = 3 + -2r + 2r

Combine like terms: -2r + 2r = 0
15 + 2r = 3 + 0
15 + 2r = 3

Add '-15' to each side of the equation.
15 + -15 + 2r = 3 + -15

Combine like terms: 15 + -15 = 0
0 + 2r = 3 + -15
2r = 3 + -15

Combine like terms: 3 + -15 = -12
2r = -12

Divide each side by '2'.
r = -6

Simplifying
r = -6

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