3x * x then 2 * -3 then add them
Answer:
£85.55.
Step-by-step explanation:
The total additions is (0.2 + 0.1) = 0.3x where x is the cost excluding VAT and service, then:
x + 0.3x = 111.21
x = 111.21 / 1.3
= £85.55.
80
The question implies that you're counting by tens & the number comes after 70 and before 90. This is the only number that fits this description.
If you have a discount on an item..
ex. 15% off coupon for $20 shirt
20 x 0.15= $3 <--- 15% of 20
20-3=$17 <--- final price of shirt after coupon
