15=-8r-1-8

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Solution for 15=-8r-1-8 equation:


Simplifying
15 = -8r + -1 + -8

Reorder the terms:
15 = -1 + -8 + -8r

Combine like terms: -1 + -8 = -9
15 = -9 + -8r

Solving
15 = -9 + -8r

Solving for variable 'r'.

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

Add '8r' to each side of the equation.
15 + 8r = -9 + -8r + 8r

Combine like terms: -8r + 8r = 0
15 + 8r = -9 + 0
15 + 8r = -9

Add '-15' to each side of the equation.
15 + -15 + 8r = -9 + -15

Combine like terms: 15 + -15 = 0
0 + 8r = -9 + -15
8r = -9 + -15

Combine like terms: -9 + -15 = -24
8r = -24

Divide each side by '8'.
r = -3

Simplifying
r = -3

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