1,8x + 2,4y=1 3x - 4y=5 решить систему уравнений.
famapsix2015
2
21.05.2019 20:50
1
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2
не будет ответа
нет действительных решений
2,4y-1.8x=1.3x-4y=5
5=0
x,y ∈ пустому множеству (нолик зачёркнутый)
-> -1.8*(5+4y)/3+2.4y=1
-> (-9-6.2y)/3+2.4y=1
-> -9-6.2y+7.2y=3
-> -9+y=3
-> y=12
X=(5+48)/3
X=53/3=17,(6)