78=9u-3

Solution for 78=9u-3 equation:

Simplifying
78 = 9u + -3

Reorder the terms:
78 = -3 + 9u

Solving
78 = -3 + 9u

Solving for variable 'u'.

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

Add '-9u' to each side of the equation.
78 + -9u = -3 + 9u + -9u

Combine like terms: 9u + -9u = 0
78 + -9u = -3 + 0
78 + -9u = -3

Add '-78' to each side of the equation.
78 + -78 + -9u = -3 + -78

Combine like terms: 78 + -78 = 0
0 + -9u = -3 + -78
-9u = -3 + -78

Combine like terms: -3 + -78 = -81
-9u = -81

Divide each side by '-9'.
u = 9

Simplifying
u = 9