joannegrace4898
13.10.2020 •
Mathematics
Does anyone know how to do this Or how to calculate this I already have apps like photomath so don't even suggest that
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Ответ:
I'm not sure what the answers you have mean. sorry! I've solved the problem, though, if that helps at all.
4x + 10y = 57
2x + 5y = 38
5y = 38-2x
y = (38-2x)/5
4x + 10((38-2x)/5) = 57
4x + 2(38-2x) = 57
4x + 76 - 4x = 57
0x + 76 = 57
the answer is no solution because 76
57
Ответ:
B) 8*2.5 = $ 20;
C) 7.50/2.50 = 3 - pound.