4u+6=-2u+21

Solution for 4u+6=-2u+21 equation:

Simplifying
4u + 6 = -2u + 21

Reorder the terms:
6 + 4u = -2u + 21

Reorder the terms:
6 + 4u = 21 + -2u

Solving
6 + 4u = 21 + -2u

Solving for variable 'u'.

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

Add '2u' to each side of the equation.
6 + 4u + 2u = 21 + -2u + 2u

Combine like terms: 4u + 2u = 6u
6 + 6u = 21 + -2u + 2u

Combine like terms: -2u + 2u = 0
6 + 6u = 21 + 0
6 + 6u = 21

Add '-6' to each side of the equation.
6 + -6 + 6u = 21 + -6

Combine like terms: 6 + -6 = 0
0 + 6u = 21 + -6
6u = 21 + -6

Combine like terms: 21 + -6 = 15
6u = 15

Divide each side by '6'.
u = 2.5

Simplifying
u = 2.5