3r-15=6

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Solution for 3r-15=6 equation: 


Simplifying
3r + -15 = 6

Reorder the terms:
-15 + 3r = 6

Solving
-15 + 3r = 6

Solving for variable 'r'.

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

Add '15' to each side of the equation.
-15 + 15 + 3r = 6 + 15

Combine like terms: -15 + 15 = 0
0 + 3r = 6 + 15
3r = 6 + 15

Combine like terms: 6 + 15 = 21
3r = 21

Divide each side by '3'.
r = 7

Simplifying
r = 7

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