Question 1127516
Let short sleeve shirts be s and long sleeve l
:
s + l = 375 thus l= 375 - s
23s + 28.50l = 9,862.50 substitute for l:
23s + 28.50(375 - s) = 9,862.50
23s + 10,687.50 - 28.50s = 9,862.50
-5.50s = -825 divide both sides by -5.50, and remember that -/- = +
s = 150 
150 short sleeves were ordered