Answer:
$12.96
Step-by-step explanation:
determine what the decimal form of 8% is
⇒ 8% = 0.08
multiply $12 by 0.08
⇒ $12 x 0.08
⇒ $0.96
add $0.96 to $12
⇒ $12 + $0.96
⇒ $12.96
new price
⇒ $12.96

Putting the value of Y = 15

So, X = 200
See description in the pic.
The answer is 30 because u need to add 60+90=150 and then subtract 180-150 which gives you 30