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17.10.2019 •
Mathematics
Shirley owns a diner. she decides to charge $1.50 for 2 egga and one piece of toast a $.90 for one egg and one piece of toast. write and solve a system of equations to determine the cost of 1 egg and the cost of 1 piece of toast
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Ответ:
1 toast costs $0.30 and 1 egg cost $0.60
Step-by-step explanation:
Let price of 1 egg be
and price of 1 toast be ![t](/tpl/images/0329/2133/3d334.png)
"$1.50 for 2 eggs and one piece of toast":
We can write![2e+t=1.50](/tpl/images/0329/2133/f7141.png)
"$.90 for one egg and one piece of toast":
We can write![e+t=0.90](/tpl/images/0329/2133/84d91.png)
Now, we can solve the first equation for t and substitute that into 2nd equation and solve for e:
Now using the value of e (0.6) and putting it back in the first equation, we will get t:
Hence, 1 toast costs $0.30 and 1 egg cost $0.60
Ответ: