31=5+3(r-8)

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Solution for 31=5+3(r-8) equation: 


Simplifying
31 = 5 + 3(r + -8)

Reorder the terms:
31 = 5 + 3(-8 + r)
31 = 5 + (-8 * 3 + r * 3)
31 = 5 + (-24 + 3r)

Combine like terms: 5 + -24 = -19
31 = -19 + 3r

Solving
31 = -19 + 3r

Solving for variable 'r'.

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

Add '-3r' to each side of the equation.
31 + -3r = -19 + 3r + -3r

Combine like terms: 3r + -3r = 0
31 + -3r = -19 + 0
31 + -3r = -19

Add '-31' to each side of the equation.
31 + -31 + -3r = -19 + -31

Combine like terms: 31 + -31 = 0
0 + -3r = -19 + -31
-3r = -19 + -31

Combine like terms: -19 + -31 = -50
-3r = -50

Divide each side by '-3'.
r = 16.66666667

Simplifying
r = 16.66666667

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