-9r+3r-7-8=

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Solution for -9r+3r-7-8= equation:


Simplifying
-9r + 3r + -7 + -8 = 0

Reorder the terms:
-7 + -8 + -9r + 3r = 0

Combine like terms: -7 + -8 = -15
-15 + -9r + 3r = 0

Combine like terms: -9r + 3r = -6r
-15 + -6r = 0

Solving
-15 + -6r = 0

Solving for variable 'r'.

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

Add '15' to each side of the equation.
-15 + 15 + -6r = 0 + 15

Combine like terms: -15 + 15 = 0
0 + -6r = 0 + 15
-6r = 0 + 15

Combine like terms: 0 + 15 = 15
-6r = 15

Divide each side by '-6'.
r = -2.5

Simplifying
r = -2.5

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