12r+21=24

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Solution for 12r+21=24 equation: 


Simplifying
12r + 21 = 24

Reorder the terms:
21 + 12r = 24

Solving
21 + 12r = 24

Solving for variable 'r'.

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

Add '-21' to each side of the equation.
21 + -21 + 12r = 24 + -21

Combine like terms: 21 + -21 = 0
0 + 12r = 24 + -21
12r = 24 + -21

Combine like terms: 24 + -21 = 3
12r = 3

Divide each side by '12'.
r = 0.25

Simplifying
r = 0.25

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