13=26r+9r-3

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Solution for 13=26r+9r-3 equation:


Simplifying
13 = 26r + 9r + -3

Reorder the terms:
13 = -3 + 26r + 9r

Combine like terms: 26r + 9r = 35r
13 = -3 + 35r

Solving
13 = -3 + 35r

Solving for variable 'r'.

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

Add '-35r' to each side of the equation.
13 + -35r = -3 + 35r + -35r

Combine like terms: 35r + -35r = 0
13 + -35r = -3 + 0
13 + -35r = -3

Add '-13' to each side of the equation.
13 + -13 + -35r = -3 + -13

Combine like terms: 13 + -13 = 0
0 + -35r = -3 + -13
-35r = -3 + -13

Combine like terms: -3 + -13 = -16
-35r = -16

Divide each side by '-35'.
r = 0.4571428571

Simplifying
r = 0.4571428571

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