31=8r+5r

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Solution for 31=8r+5r equation:


Simplifying
31 = 8r + 5r

Combine like terms: 8r + 5r = 13r
31 = 13r

Solving
31 = 13r

Solving for variable 'r'.

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

Add '-13r' to each side of the equation.
31 + -13r = 13r + -13r

Combine like terms: 13r + -13r = 0
31 + -13r = 0

Add '-31' to each side of the equation.
31 + -31 + -13r = 0 + -31

Combine like terms: 31 + -31 = 0
0 + -13r = 0 + -31
-13r = 0 + -31

Combine like terms: 0 + -31 = -31
-13r = -31

Divide each side by '-13'.
r = 2.384615385

Simplifying
r = 2.384615385

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