27=4u+5u

Solution for 27=4u+5u equation:

Simplifying
27 = 4u + 5u

Combine like terms: 4u + 5u = 9u
27 = 9u

Solving
27 = 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.
27 + -9u = 9u + -9u

Combine like terms: 9u + -9u = 0
27 + -9u = 0

Add '-27' to each side of the equation.
27 + -27 + -9u = 0 + -27

Combine like terms: 27 + -27 = 0
0 + -9u = 0 + -27
-9u = 0 + -27

Combine like terms: 0 + -27 = -27
-9u = -27

Divide each side by '-9'.
u = 3

Simplifying
u = 3