k(2.2)+k(1.8)+5=15

Solution for k(2.2)+k(1.8)+5=15 equation:

Simplifying
k(2.2) + k(1.8) + 5 = 15

Reorder the terms for easier multiplication:
2.2k + k(1.8) + 5 = 15

Reorder the terms for easier multiplication:
2.2k + 1.8k + 5 = 15

Reorder the terms:
5 + 2.2k + 1.8k = 15

Combine like terms: 2.2k + 1.8k = 4k
5 + 4k = 15

Solving
5 + 4k = 15

Solving for variable 'k'.

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

Add '-5' to each side of the equation.
5 + -5 + 4k = 15 + -5

Combine like terms: 5 + -5 = 0
0 + 4k = 15 + -5
4k = 15 + -5

Combine like terms: 15 + -5 = 10
4k = 10

Divide each side by '4'.
k = 2.5

Simplifying
k = 2.5