-90=15r

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Solution for -90=15r equation:


Simplifying
-90 = 15r

Solving
-90 = 15r

Solving for variable 'r'.

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

Add '-15r' to each side of the equation.
-90 + -15r = 15r + -15r

Combine like terms: 15r + -15r = 0
-90 + -15r = 0

Add '90' to each side of the equation.
-90 + 90 + -15r = 0 + 90

Combine like terms: -90 + 90 = 0
0 + -15r = 0 + 90
-15r = 0 + 90

Combine like terms: 0 + 90 = 90
-15r = 90

Divide each side by '-15'.
r = -6

Simplifying
r = -6

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