21+9l=3l

Solution for 21+9l=3l equation:

Simplifying
21 + 9l = 3l

Solving
21 + 9l = 3l

Solving for variable 'l'.

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

Add '-3l' to each side of the equation.
21 + 9l + -3l = 3l + -3l

Combine like terms: 9l + -3l = 6l
21 + 6l = 3l + -3l

Combine like terms: 3l + -3l = 0
21 + 6l = 0

Add '-21' to each side of the equation.
21 + -21 + 6l = 0 + -21

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

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

Divide each side by '6'.
l = -3.5

Simplifying
l = -3.5