4r-8+9r-1=264

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Solution for 4r-8+9r-1=264 equation:


Simplifying
4r + -8 + 9r + -1 = 264

Reorder the terms:
-8 + -1 + 4r + 9r = 264

Combine like terms: -8 + -1 = -9
-9 + 4r + 9r = 264

Combine like terms: 4r + 9r = 13r
-9 + 13r = 264

Solving
-9 + 13r = 264

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 + 9 + 13r = 264 + 9

Combine like terms: -9 + 9 = 0
0 + 13r = 264 + 9
13r = 264 + 9

Combine like terms: 264 + 9 = 273
13r = 273

Divide each side by '13'.
r = 21

Simplifying
r = 21

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