Đáp án: giải hệ phuogn trình ( ((2x-3y=1) (4x+3y=11)) - => ( ((2x-3y =1) (4x+3y = 11)) => ( ((4x -6y=2) (4x +3y = 11)) => 4x+3y-4x+6y = 11-2 =>9y = 9 => y = 1 => x = ( 1 + 3 x 1 )/2 = 2 #AC

=> ( ((2x-3y =1) (4x+3y = 11)) => ( ((4x -6y=2) (4x +3y = 11)) => 4x+3y-4x+6y = 11-2 =>9y = 9 => y = 1 => x = ( 1 + 3 x 1 )/2 = 2 #AC

nhihoang626

5 tháng trước

giải hệ phuogn trình $\left \{ {{2x-3y=1} \atop {4x+3y=11}} \right.$

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Trần Bình Minh

5 tháng trước

=> $\left \{ {{2x-3y =1} \atop {4x+3y = 11}} \right.$

=> $\left \{ {{4x -6y=2} \atop {4x +3y = 11}} \right.$

=> `4x+3y-4x+6y = 11-2`

=>`9y = 9`

=> `y = 1`

=> `x = ( 1 + 3 x 1 )/2 = 2`

#AC

MuaCute

5 tháng trước

$\left \{ {{2x-3y = 1} \atop {4x +3y = 11}} \right.$

⇔ $\left \{ {{8x - 12y = 4} \atop {8x + 6y = 22}} \right.$

⇔ `8x-12y-8x-6y = 4-22`

⇔ `-18y=-18`

⇔ `y=1`

Thay `y=1` vào `2x-3y=1`,ta có pt :

`2x - 3.1 = 1`

⇔ `2x = 4`

⇔ `x = 2`

Vậy pt có nghiệm duy nhất $\left \{ {{x=2} \atop {y=1}} \right.$

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giải hệ phuogn trình $\left \{ {{2x-3y=1} \atop {4x+3y=11}} \right.$

2 câu trả lời

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việt nam dành độc lập vào năm nào

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.I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.

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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.

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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I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.