9x+rx=s

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Solution for 9x+rx=s equation: 


Simplifying
9x + rx = s

Reorder the terms:
rx + 9x = s

Solving
rx + 9x = s

Solving for variable 'r'.

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

Add '-9x' to each side of the equation.
rx + 9x + -9x = s + -9x

Combine like terms: 9x + -9x = 0
rx + 0 = s + -9x
rx = s + -9x

Divide each side by 'x'.
r = sx-1 + -9

Simplifying
r = sx-1 + -9

Reorder the terms:
r = -9 + sx-1

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