56=3u+4u

Solution for 56=3u+4u equation:

Simplifying
56 = 3u + 4u

Combine like terms: 3u + 4u = 7u
56 = 7u

Solving
56 = 7u

Solving for variable 'u'.

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

Add '-7u' to each side of the equation.
56 + -7u = 7u + -7u

Combine like terms: 7u + -7u = 0
56 + -7u = 0

Add '-56' to each side of the equation.
56 + -56 + -7u = 0 + -56

Combine like terms: 56 + -56 = 0
0 + -7u = 0 + -56
-7u = 0 + -56

Combine like terms: 0 + -56 = -56
-7u = -56

Divide each side by '-7'.
u = 8

Simplifying
u = 8