-2 * (5x + 4) - 2 = -2.5x + 4

Distribute -2 on the left side:

-10x - 8 - 2 = -2.5x + 4

-10x - 10 = -2.5x + 4

Add 10x to both sides: -10 = 7.5x + 4

Subtract 4 from both sides: -14 = 7.5x

Divide by 7.5: x = -14 / 7.5 = -28/15