-9=4r+5r

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Solution for -9=4r+5r equation:


Simplifying
-9 = 4r + 5r

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

Solving
-9 = 9r

Solving for variable 'r'.

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

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

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

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

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

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

Divide each side by '-9'.
r = -1

Simplifying
r = -1

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