1.2=5*0.4(5)*(1-0.4)L

Solution for 1.2=5*0.4(5)*(1-0.4)L equation:

Simplifying
1.2 = 5 * 0.4(5)(1 + -0.4) * L

Combine like terms: 1 + -0.4 = 0.6
1.2 = 5 * 0.4 * 5(0.6) * L

Multiply 5 * 0.4
1.2 = 2 * 5 * 0.6L

Multiply 2 * 5
1.2 = 10 * 0.6L

Multiply 10 * 0.6
1.2 = 6L

Solving
1.2 = 6L

Solving for variable 'L'.

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

Add '-6L' to each side of the equation.
1.2 + -6L = 6L + -6L

Combine like terms: 6L + -6L = 0
1.2 + -6L = 0

Add '-1.2' to each side of the equation.
1.2 + -1.2 + -6L = 0 + -1.2

Combine like terms: 1.2 + -1.2 = 0.0
0.0 + -6L = 0 + -1.2
-6L = 0 + -1.2

Combine like terms: 0 + -1.2 = -1.2
-6L = -1.2

Divide each side by '-6'.
L = 0.2

Simplifying
L = 0.2