-15q+8q+9r-12r=

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Solution for -15q+8q+9r-12r= equation:


Simplifying
-15q + 8q + 9r + -12r = 0

Combine like terms: -15q + 8q = -7q
-7q + 9r + -12r = 0

Combine like terms: 9r + -12r = -3r
-7q + -3r = 0

Solving
-7q + -3r = 0

Solving for variable 'q'.

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

Add '3r' to each side of the equation.
-7q + -3r + 3r = 0 + 3r

Combine like terms: -3r + 3r = 0
-7q + 0 = 0 + 3r
-7q = 0 + 3r
Remove the zero:
-7q = 3r

Divide each side by '-7'.
q = -0.4285714286r

Simplifying
q = -0.4285714286r

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