3r=30r+21

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Solution for 3r=30r+21 equation: 


Simplifying
3r = 30r + 21

Reorder the terms:
3r = 21 + 30r

Solving
3r = 21 + 30r

Solving for variable 'r'.

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

Add '-30r' to each side of the equation.
3r + -30r = 21 + 30r + -30r

Combine like terms: 3r + -30r = -27r
-27r = 21 + 30r + -30r

Combine like terms: 30r + -30r = 0
-27r = 21 + 0
-27r = 21

Divide each side by '-27'.
r = -0.7777777778

Simplifying
r = -0.7777777778

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