9r-4(r-9)+5(s-9)=

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Solution for 9r-4(r-9)+5(s-9)= equation:


Simplifying
9r + -4(r + -9) + 5(s + -9) = 0

Reorder the terms:
9r + -4(-9 + r) + 5(s + -9) = 0
9r + (-9 * -4 + r * -4) + 5(s + -9) = 0
9r + (36 + -4r) + 5(s + -9) = 0

Reorder the terms:
9r + 36 + -4r + 5(-9 + s) = 0
9r + 36 + -4r + (-9 * 5 + s * 5) = 0
9r + 36 + -4r + (-45 + 5s) = 0

Reorder the terms:
36 + -45 + 9r + -4r + 5s = 0

Combine like terms: 36 + -45 = -9
-9 + 9r + -4r + 5s = 0

Combine like terms: 9r + -4r = 5r
-9 + 5r + 5s = 0

Solving
-9 + 5r + 5s = 0

Solving for variable 'r'.

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

Add '9' to each side of the equation.
-9 + 5r + 9 + 5s = 0 + 9

Reorder the terms:
-9 + 9 + 5r + 5s = 0 + 9

Combine like terms: -9 + 9 = 0
0 + 5r + 5s = 0 + 9
5r + 5s = 0 + 9

Combine like terms: 0 + 9 = 9
5r + 5s = 9

Add '-5s' to each side of the equation.
5r + 5s + -5s = 9 + -5s

Combine like terms: 5s + -5s = 0
5r + 0 = 9 + -5s
5r = 9 + -5s

Divide each side by '5'.
r = 1.8 + -1s

Simplifying
r = 1.8 + -1s

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