Toán Lớp 9: Giải tìm x,y
56x + 62y = 0,83
3/2x + y =0,025
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Toán Lớp 9: Giải tìm x,y
56x + 62y = 0,83
3/2x + y =0,025
Comments ( 1 )
<=>$\begin{cases} 56x + 62y = 0,83\\\\3x + 2y =0,05 \end{cases}$
<=>$\begin{cases} 56x + 62y = 0,83\\\\93x + 62y =1,55 \end{cases}$
<=>$\begin{cases} -37x=-0,72\\\\\dfrac{3}{2}x + y =0,025 \end{cases}$
<=>$\begin{cases} x=\dfrac{18}{925}\\\\y= -\dfrac{31}{7400}\end{cases}$
$\text{Vậy hệ pt có nghiệm }$ (x;y)=(18/925;-31/7400)