Cau c thoi may ban ơi

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Cau c thoi
may ban ơi
cau-c-thoi-may-ban-oi

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Môn Toán Doris 4 years 2020-10-15T03:27:01+00:00 2020-10-15T03:27:01+00:00 2 Answers 91 views 0

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Captcha* Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )

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Farah · Answer 1 · 2020-10-15T03:28:40+00:00

Farah

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2020-10-15T03:28:40+00:00 October 15, 2020 at 3:28 am

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$6, 51 : 15, 19$

= $\frac{6, 51}{15, 19} = \frac{3.2, 17}{7.2 .17} = \frac{3}{7}$

$3 : 7$

= $\frac{3}{7}$

Do đó ta có tỉ lệ thức 6,51:15,19=3:7 hoặc $\frac{6, 51}{15, 19} = \frac{3}{7}$

Cherry · Answer 2 · 2020-10-15T03:28:51+00:00

Cherry

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2020-10-15T03:28:51+00:00 October 15, 2020 at 3:28 am

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Có:`6,51:15,19=(6,51)/(15,19)=3/7`

và `3:7=3/7`

`⇒6,51:15,19=3:7`

Vậy 6,51:15,19 và 3:7 có thể lập đc tỉ số