3r+7=(31)

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Solution for 3r+7=(31) equation: 


Simplifying
3r + 7 = (31)

Reorder the terms:
7 + 3r = (31)
7 + 3r = 31

Solving
7 + 3r = 31

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 + -7 + 3r = 31 + -7

Combine like terms: 7 + -7 = 0
0 + 3r = 31 + -7
3r = 31 + -7

Combine like terms: 31 + -7 = 24
3r = 24

Divide each side by '3'.
r = 8

Simplifying
r = 8

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