-12r-21s+r-15r=

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Solution for -12r-21s+r-15r= equation:


Simplifying
-12r + -21s + r + -15r = 0

Reorder the terms:
-12r + r + -15r + -21s = 0

Combine like terms: -12r + r = -11r
-11r + -15r + -21s = 0

Combine like terms: -11r + -15r = -26r
-26r + -21s = 0

Solving
-26r + -21s = 0

Solving for variable 'r'.

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

Add '21s' to each side of the equation.
-26r + -21s + 21s = 0 + 21s

Combine like terms: -21s + 21s = 0
-26r + 0 = 0 + 21s
-26r = 0 + 21s
Remove the zero:
-26r = 21s

Divide each side by '-26'.
r = -0.8076923077s

Simplifying
r = -0.8076923077s

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