84=r(28)

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Solution for 84=r(28) equation:


Simplifying
84 = r(28)

Reorder the terms for easier multiplication:
84 = 28r

Solving
84 = 28r

Solving for variable 'r'.

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

Add '-28r' to each side of the equation.
84 + -28r = 28r + -28r

Combine like terms: 28r + -28r = 0
84 + -28r = 0

Add '-84' to each side of the equation.
84 + -84 + -28r = 0 + -84

Combine like terms: 84 + -84 = 0
0 + -28r = 0 + -84
-28r = 0 + -84

Combine like terms: 0 + -84 = -84
-28r = -84

Divide each side by '-28'.
r = 3

Simplifying
r = 3

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