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zabuxaev
@zabuxaev
August 2022
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решите эти системы уравнений методом алгебраического сложения а) x=3-y 2x-y=0 б) y+x=3 y-0,5x=-3
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Igornatev
А) x=3-y
2x-y=0
2(3-y)-y=0
6-2y-y=0
-3y= -6
y=2
x=3-y
x=3-2=1
б) y+x=3
y-0,5x=-3
y=3-x
3-x-0,5x= -3
-1,5x= -6
x=4
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Answers & Comments
2x-y=0
2(3-y)-y=0
6-2y-y=0
-3y= -6
y=2
x=3-y
x=3-2=1
б) y+x=3
y-0,5x=-3
y=3-x
3-x-0,5x= -3
-1,5x= -6
x=4