Đáp án: Giải hệt pt sau ( ((-7-n=0) (36m-3-13n=0)) - -7-n=036m-3-13n=0 <=>-n=736m=3+13n <=> n=-736m=3+13(-7) <=>n=-736m=-88 <=>n=-7m=-(22/9) Vậy hệ phương trình có nghiệm duy nhất (n;m)=(-7;-22/9)

-7-n=036m-3-13n=0 <=>-n=736m=3+13n <=> n=-736m=3+13(-7) <=>n=-736m=-88 <=>n=-7m=-(22/9) Vậy hệ phương trình có nghiệm duy nhất (n;m)=(-7;-22/9)

Bakestko

5 tháng trước

Giải hệt pt sau : $\left \{ {{-7-n=0} \atop {36m-3-13n=0}} \right.$

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RhymesterHopeless

5 tháng trước

$\begin{cases}-7-n=0\\36m-3-13n=0\end{cases}$

`<=>`$\begin{cases}-n=7\\36m=3+13n \end{cases}$`<=>`$\begin{cases} n=-7\\36m=3+13(-7)\end{cases}$

`<=>`$\begin{cases}n=-7\\36m=-88 \end{cases}$`<=>`$\begin{cases}n=-7\\m=-\dfrac{22}{9} \end{cases}$

Vậy hệ phương trình có nghiệm duy nhất `(n;m)=(-7;-22/9)`

hieudz6

5 tháng trước

`{(-7 - n = 0),(36m - 3 - 13n = 0):}`

`=> {(n = -7),(36m - 3 - 13n = 0):}`

`=> 36m - 3 - 13 . ( -7 ) = 0`

`⇔ m = -22/9`

`⇔ m = -22/9 , n = -7`

Thử lại :

`⇔ {(-7 - ( - 7 ) = 0),(36 . -22/9 -3 - 13 . ( -7 ) = 0):}`

`⇔ {(0=0),(0=0):}`

Vậy phương phương trình có nghiệm duy nhất `( n ; m ) = ( -7 ; -22/ 9 )`

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Giải hệt pt sau : $\left \{ {{-7-n=0} \atop {36m-3-13n=0}} \right.$

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Choose the best answer.I think you should buy _____ pack of mineral water instead. And you can also buy _____ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ______ cookies and soft candies.

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Choose the best answer.
We should decorate our living room with _ orange banner. We also need ____ ribbons, balloons, party hats and costume.

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