4r=3r+21

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Solution for 4r=3r+21 equation: 


Simplifying
4r = 3r + 21

Reorder the terms:
4r = 21 + 3r

Solving
4r = 21 + 3r

Solving for variable 'r'.

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

Add '-3r' to each side of the equation.
4r + -3r = 21 + 3r + -3r

Combine like terms: 4r + -3r = 1r
1r = 21 + 3r + -3r

Combine like terms: 3r + -3r = 0
1r = 21 + 0
1r = 21

Divide each side by '1'.
r = 21

Simplifying
r = 21

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