insulation62
05.08.2019 •
Mathematics
Solving by using elimination: 7x+4y=2 9x-4y=30
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Ответ:
9x - 4y= 30
16x / = 32
x= 32:16
x=2
7x+4y=2
7*2 + 4y=2
14 +4y=2
4y= 2-14
4y= -12
y= -12 : 4
y= - 3
Ответ: