PSLE
A fruit stall sold grapefruits at 70¢ and tomatoes at 40¢ each. Opal bought some grapefruits and Wendy bought some tomatoes from the stall. Wendy spent $0.30 less than Opal, but had 6 fruits more than Opal.

1. How many tomatoes did Wendy buy?
2. How much did Opal spend on the grapefruits?

	Grapefruits	Tomatoes
Number	1 u	1 u + 6
Value	0.7	0.4
Total value	0.7 u	0.4 u + 2.4

(a)
Number of grapefruits that Opal bought = 1 u
Number of tomatoes that Wendy bought = 1 u + 6

Amount that Opal paid = 0.7 x 1 u = 0.7 u
Amount that Wendy paid = 0.4(1 u + 6) = 0.4 u + 2.4

If Wendy spent another $0.30, both Wendy and Opal would spend the same amount.

0.7 u = 0.4 u + 2.4 + 0.3
0.7 u - 0.4 u = 2.4 + 0.3
0.3 u = 2.7

1 u = 2.7 ÷ 0.3 = 9

Number of tomatoes that Wendy bought
= 1 u + 6
= 9 + 6
= 15

(b)
Amount that Opal spent on the grapefruits
= 0.7 u 
= 0.7 x 9 
= $6.30

Answer(s): (a) 9; (b) $6.30