Problema Solution
a tailor takes twice as much time to make 3 dresses as he would need to make 5 shirts. if he takes 90 hours altogether to make 9 dresses and 15 shirts, how long does he take to make each shirt.
Answer provided by our tutors
Let
x = hours needed per dress
y = hours needed per shirt
3x = 2*5y
9x + 15y = 90
........
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........
x = 60/9 hr
y = 2 hr
The tailor needs 2 hours to make each shirt.