Answer:

Step-by-step explanation:
I take it that the expression is

Collect like terms and add the coefficients


4/20=x/100 20 times 5 equal 100 so 5 times 4 equals 20 so the answer is 20%
It's the absolute value which is 8
Answer:
3.7
Step-by-step explanation:
IF THE BOOK COSTS 26.50 AND YOU GET A DISCOUNT OF 8%, YOU NEED TO FIND OUT HOW MUCH IS 8% OF 26.50, WHICH IS IS 2.12 DISCOUNT
SO YOUR BOOK COSTS NOW 26.50-2.12=24.38
NOW, IF YOU WILL PAY 8% TAXES, EIGHT PERCENT OF 24.38 IS 1.95
YOUR BOOK WILL COST 24.38+1.95=26.33