Question 1105036
let t-shirts be t and hats be h
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t + h = 20 therefore t = 20 - h
and
12.50t + 15h = 272.50 here, substitute for t
12.50(20 - h) + 15h = 272.50
250 - 12.50h + 15h = 272.50
2.5h = 22.50
h = 9 so he bought 9 hats and 20 - 9 = 11 t-shirts
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Check:
(9 x 15) + (11 x 12.50) = 135 + 137.50 = 272.50 Correct