78=5u-12

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Solution for 78=5u-12 equation:


Simplifying
78 = 5u + -12

Reorder the terms:
78 = -12 + 5u

Solving
78 = -12 + 5u

Solving for variable 'u'.

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

Add '-5u' to each side of the equation.
78 + -5u = -12 + 5u + -5u

Combine like terms: 5u + -5u = 0
78 + -5u = -12 + 0
78 + -5u = -12

Add '-78' to each side of the equation.
78 + -78 + -5u = -12 + -78

Combine like terms: 78 + -78 = 0
0 + -5u = -12 + -78
-5u = -12 + -78

Combine like terms: -12 + -78 = -90
-5u = -90

Divide each side by '-5'.
u = 18

Simplifying
u = 18

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