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a. the number of shirts ordered and the total cost of shirts
b. suppose the cost of shirts at both stores is the same when x shirts are ordered, and the total cost is y dollars
y = 10x + 15
y = 5x + 50
10x + 15 = 5x + 50
5x = 35
x = 7 shirts
y = 10 * 7 + 15 = 85 dollarts
c. If 7 shirts are ordered, the total cost will be the same in both stores, and the total cost is 85 dollars.
希望能够帮到你^-^
b. suppose the cost of shirts at both stores is the same when x shirts are ordered, and the total cost is y dollars
y = 10x + 15
y = 5x + 50
10x + 15 = 5x + 50
5x = 35
x = 7 shirts
y = 10 * 7 + 15 = 85 dollarts
c. If 7 shirts are ordered, the total cost will be the same in both stores, and the total cost is 85 dollars.
希望能够帮到你^-^
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