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Llana [10]
3 years ago
9

The cost of eight stress balls and five T-shirts is $111.75. The cost of twelve stress balls and four T-shirts is $102.00. What

is the cost of one T-shirt? (A) $9.75 (B) $12.50 (C) $17.75 (D) $18.25 (E) $18.75
Mathematics
1 answer:
aksik [14]3 years ago
6 0
Let's say stress ball cost x and t shirt cost y
8x+5y=111.75
12x+4y=102.00→3x+y=25.5→y=25.5-3x

8x+5(25.5-3x)= 111.75
8x+127.5-15x=111.75
-7x=-15.75
x=2.25

12x+4y=102
12(2.25)+4y=102
27+4y=102
4y=75
y=18.75

d is the correct answer
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