3 (2 - 0.9h)  ( 1.3h  4)

If you are solving for "h" here you go.

Simplifying

3 (2 + - 0.9h) + (-1.3h + - 4) = 0

(2 * 3 + - 0.9h * 3) + (-1.3h + - 4) = 0

(6 + - 2.7h) + (-1.3h + - 4) = 0

Reorder the terms:

6 + - 2.7h + (-4 + - 1.3h) = 0

Remove parenthesis around (-4 + - 1.3h)

6 + - 2.7h + - 4 + - 1.3h = 0

Reorder the terms:

6 + - 4 + - 2.7h + - 1.3h = 0

Combine like terms: 6 + - 4 = 2

2 + - 2.7h + - 1.3h = 0

Combine like terms: - 2.7h + - 1.3h = - 4h

2 + - 4h = 0

Solving

2 + - 4h = 0

Solving for variable 'h'.

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

Add '-2' to each side of the equation.

2 + - 2 + - 4h = 0 + - 2

Combine like terms: 2 + - 2 = 0

0 + - 4h = 0 + - 2

-4h = 0 + - 2

Combine like terms: 0 + - 2 = - 2

-4h = - 2

Divide each side by '-4'.

h = 0.5

Simplifying

h = 0.5

You're welcome!