21r-6r=-6-21

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Solution for 21r-6r=-6-21 equation: 


Simplifying
21r + -6r = -6 + -21

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

Combine like terms: -6 + -21 = -27
15r = -27

Solving
15r = -27

Solving for variable 'r'.

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

Divide each side by '15'.
r = -1.8

Simplifying
r = -1.8

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