3-24+3r=9

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Solution for 3-24+3r=9 equation: 


Simplifying
3 + -24 + 3r = 9

Combine like terms: 3 + -24 = -21
-21 + 3r = 9

Solving
-21 + 3r = 9

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 + 3r = 9 + 21

Combine like terms: -21 + 21 = 0
0 + 3r = 9 + 21
3r = 9 + 21

Combine like terms: 9 + 21 = 30
3r = 30

Divide each side by '3'.
r = 10

Simplifying
r = 10

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