Mrs Ali bought 15 apples and pears for $7.40. Each apple cost 40c and each
pear cost 20¢ more than an apple. How many apples did Mrs Ali buy?
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Answer:
Mrs Ali bought 8 apples
Step-by-step explanation:
Apples & Pears: 15 Total
Total Price: $7.40
1 Apple: 0.40
1 Pear: 0.60
a = apple
p = pear
Solve system of equation
a + p = 15
.40a + .60p = 7.40
-.60(a+p) = -.60(15) = -.60a-.60p = -9
combine both equation
.40a + .60p = 7.40 + -.60a-.60p = -9
= -.20a = -1.6
a = -1.6/-.20
a = 8
a = 8
p = 7 (note p/pears is not needed but to find p just plug in a=8 to the original equation and solve for p)
Mrs Ali bought 8 apples
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