(9r-s)+(4r-s)=

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Solution for (9r-s)+(4r-s)= equation:


Simplifying
(9r + -1s) + (4r + -1s) = 0

Remove parenthesis around (9r + -1s)
9r + -1s + (4r + -1s) = 0

Remove parenthesis around (4r + -1s)
9r + -1s + 4r + -1s = 0

Reorder the terms:
9r + 4r + -1s + -1s = 0

Combine like terms: 9r + 4r = 13r
13r + -1s + -1s = 0

Combine like terms: -1s + -1s = -2s
13r + -2s = 0

Solving
13r + -2s = 0

Solving for variable 'r'.

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

Add '2s' to each side of the equation.
13r + -2s + 2s = 0 + 2s

Combine like terms: -2s + 2s = 0
13r + 0 = 0 + 2s
13r = 0 + 2s
Remove the zero:
13r = 2s

Divide each side by '13'.
r = 0.1538461538s

Simplifying
r = 0.1538461538s

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