Ineed to know how to solve this algebraic equation

18x0.20 = 3.6 18-3.6 = 14.4

anwser- $14.40

Step-by-step explanation:

18 is the original price of the shirt, and 20% is the discount. You can write the discount as 0.20 because it is the same as 20/100. To get the discount you have to multiply the original price and the discount, 18x0.20, 3.6. 3.6 is the discount price which means, it is not the final price because it only is 20% of 18. To check, multiply 3.6 by 5 becuse  100%= 1  and 5 times 0.2 equals to 100% (1). 3.6 x5 = 18. To get the final price, subtract 3.6 from 18 so the  dicount  can be added to the  final price. Hope this helps :)