4x-9-8x+2+9r=13

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Solution for 4x-9-8x+2+9r=13 equation:


Simplifying
4x + -9 + -8x + 2 + 9r = 13

Reorder the terms:
-9 + 2 + 9r + 4x + -8x = 13

Combine like terms: -9 + 2 = -7
-7 + 9r + 4x + -8x = 13

Combine like terms: 4x + -8x = -4x
-7 + 9r + -4x = 13

Solving
-7 + 9r + -4x = 13

Solving for variable 'r'.

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

Add '7' to each side of the equation.
-7 + 9r + 7 + -4x = 13 + 7

Reorder the terms:
-7 + 7 + 9r + -4x = 13 + 7

Combine like terms: -7 + 7 = 0
0 + 9r + -4x = 13 + 7
9r + -4x = 13 + 7

Combine like terms: 13 + 7 = 20
9r + -4x = 20

Add '4x' to each side of the equation.
9r + -4x + 4x = 20 + 4x

Combine like terms: -4x + 4x = 0
9r + 0 = 20 + 4x
9r = 20 + 4x

Divide each side by '9'.
r = 2.222222222 + 0.4444444444x

Simplifying
r = 2.222222222 + 0.4444444444x

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