We have the following:

solving for x

The solution of x is equal to 28, therefore 12 is not a solution of the equation
The correct answer is
III, I, II, IV
8a - 5
6x2
18x3 + 5ab - 6y
4x3y + 3x2 - xy - 4
Answer:
87.5
Step-by-step explanation:
100 - (12.5% × 100)
100 - 12.5% × 100
(1 - 12.5%) × 100
(100% - 12.5%) × 100
87.5% × 100
87.5 ÷ 100 × 100
87.5 × 100 ÷ 100
8,750 ÷ 100 = 87.5
19 if u add all separately but it is 89 it u don't