84=4u+12

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Solution for 84=4u+12 equation:


Simplifying
84 = 4u + 12

Reorder the terms:
84 = 12 + 4u

Solving
84 = 12 + 4u

Solving for variable 'u'.

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

Add '-4u' to each side of the equation.
84 + -4u = 12 + 4u + -4u

Combine like terms: 4u + -4u = 0
84 + -4u = 12 + 0
84 + -4u = 12

Add '-84' to each side of the equation.
84 + -84 + -4u = 12 + -84

Combine like terms: 84 + -84 = 0
0 + -4u = 12 + -84
-4u = 12 + -84

Combine like terms: 12 + -84 = -72
-4u = -72

Divide each side by '-4'.
u = 18

Simplifying
u = 18

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