Question

Amanda bought 4 shirts and 9 skirts for $168.75. On another day she bought 3 shirts and 12 skirts for $172.50. How much did she pay for 1

shirt and 1 skirt?
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Answer 1

Answer:shirt = $22.5

skirt= $8.75

Explanation:

Let shirt be x and skirt be y

4x + 9y = 168.75--------1

3x + 12y = 172.5---------2

Using elimination method

Multiply eqn 1 by 3 and eqn 2 by 4

12x + 27y= 506.25

12x + 48y = 690

Subtracting

-21y = -183.75

y = $8.75

Put in eqn 1

4x + 9×8.75 = 168.75

4x = 168.75 - 78.75

4x = 90

x = $22.5