Joseph has a loyalty card good for a 20% discount at his local pharmacy. What would his total in dollars and cents be, after the discount and before tax, if the total cost of all the items he wants to buy is 42.05? Round to the nearest cent.

الحلّ

J ose p h ha s a l oy a lt y c a r d g oo d f or a 20% d i sco u n t a t hi s l oc a l p ha r ma cy . Wha t w o u l d hi s t o t a l in d o ll a rs an d ce n t s b e, a f t er t h e d i sco u n t an d b e f ore t a x, i f t h e t o t a l cos t o f a ll t h e i t e m s h e w an t s t o b u y i s 42.05 ? R o u n d t o t h e n e a res t ce n t .

Amount after discount : 33.64

خطوات الحلّ

Translate the problem into an equation:

x = 42.05 - 0.2 \cdot 42.05

x = 42.05 - 0.2 \cdot 42.05 : x = 33.64

Amount after discount : 33.64