1-3(l-1)-(l+1)=0

Solution for 1-3(l-1)-(l+1)=0 equation:

Simplifying
1 + -3(l + -1) + -1(l + 1) = 0

Reorder the terms:
1 + -3(-1 + l) + -1(l + 1) = 0
1 + (-1 * -3 + l * -3) + -1(l + 1) = 0
1 + (3 + -3l) + -1(l + 1) = 0

Reorder the terms:
1 + 3 + -3l + -1(1 + l) = 0
1 + 3 + -3l + (1 * -1 + l * -1) = 0
1 + 3 + -3l + (-1 + -1l) = 0

Reorder the terms:
1 + 3 + -1 + -3l + -1l = 0

Combine like terms: 1 + 3 = 4
4 + -1 + -3l + -1l = 0

Combine like terms: 4 + -1 = 3
3 + -3l + -1l = 0

Combine like terms: -3l + -1l = -4l
3 + -4l = 0

Solving
3 + -4l = 0

Solving for variable 'l'.

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

Add '-3' to each side of the equation.
3 + -3 + -4l = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -4l = 0 + -3
-4l = 0 + -3

Combine like terms: 0 + -3 = -3
-4l = -3

Divide each side by '-4'.
l = 0.75

Simplifying
l = 0.75