lennyatme
18.11.2019 •
Mathematics
Solve each system of linear equations x+y=5 x-3y=3
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Ответ:
x-3y=3
x-3(5-x)=3
x-15+3x=3
4x=18
x=4.5
y=5-x
y=0.5
check
x+y=5 4.5+0.5=5
x-3y=3 4.5-1.5=3
Ответ: