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MAVERICK [17]
3 years ago
11

Write a problem that could be solved using. 7x-4y=20;3x+4y=20

Mathematics
1 answer:
BartSMP [9]3 years ago
3 0
Jim bought x iphones for seven coupons each and sold y android phones for 4 coupons each. He got 20 coupons.
Julia bought the same number iphones for 3 coupons each and bought the same number Android phones for 4 coupons each. She got 20 coupons too. Please find quantity of iphones they will get and quantity of Android phones sold by Jim and got by Julia

{7x-4y=20
+
{3x+4y=20

10x=40
x=4
28-4y=20
4y=8
y=2

Answer
x=4; y=2

Jim and Julia bought 8 iphones and Jim sold 2 Android phones. Julia bought 2 Android phones.
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Question 2 (Multiple Choice Worth 1 points)
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3 years ago
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