ValeriaVironche953
12.01.2021 •
Mathematics
5.) x + 3y = 21
- 4x + y = 0
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Ответ:
Step-by-step explanation:
x + 3y = 21
- 4x + y = 0
y = 4x
x + 3y = 21
x + 3(4x) = 21
x + 12x = 21
13x = 21
x = 21/13
y = 4x
y = 4 (21/13)
y = 84/13
(x, y) = (21/13 , 84/13)
Ответ:
$3.25
Step-by-step explanation:
all u have to do is take the amount and divide my the miles
so 4680/1440= 3.25