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kiki3002
20.10.2020 •
Mathematics
3 friends split $55.00 evenly
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Ответ:
We divide right? if yes then great!
18 remainder 3 so 18.3
Ответ:
sweatshirts(x) = $24, shorts(y) = $12, t-shirts(z) = $8
Step-by-step explanation:
x = sweatshirts : y = shorts : z = t-shirts
price of sweatshirt is twice the price of shorts
x = 2y
price of t-shirt is 4 less the price of shorts
z = y - 4
purchased 3 sweatshirts, 2 shorts, and 5 t-shirts for 136
3x + 2y + 5z = 136
now we sub the first two equations into the 3rd one
3x + 2y + 5z = 136
3(2y) + 2y + 5(y - 4) = 136
6y + 2y + 5y - 20 = 136
13y = 156
y = 156/13
y = 12
x = 2y2(12) = 24
z = y - 412 - 4 = 8
check..
3x + 2y + 5z = 136
3(24) + 2(12) ++ 5(8) = 136
72 + 24 + 40 = 136
136 = 136 (correct)