15=-2r+7

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Solution for 15=-2r+7 equation:


Simplifying
15 = -2r + 7

Reorder the terms:
15 = 7 + -2r

Solving
15 = 7 + -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 = 7 + -2r + 2r

Combine like terms: -2r + 2r = 0
15 + 2r = 7 + 0
15 + 2r = 7

Add '-15' to each side of the equation.
15 + -15 + 2r = 7 + -15

Combine like terms: 15 + -15 = 0
0 + 2r = 7 + -15
2r = 7 + -15

Combine like terms: 7 + -15 = -8
2r = -8

Divide each side by '2'.
r = -4

Simplifying
r = -4

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