Đáp án:
`2/5÷3/5×x+4/7=1/3+4/7`
`⇒ 2/5÷3/5×x=1/3+4/7-4/7`
`⇒ 2/5÷3/5×x=1/3`
`⇒ 3/5×x=2/5÷1/3`
`⇒ 3/5×x=6/5`
`⇒ x=6/5÷3/5`
`⇒ x=2`
Bạn tham khảo :
2/5 : 3/5× x + 4/7 = 1/3 + 4/7
2/3× x+ 4/7 = 1/3+4/7$
2/3×. x + 4/7 = 7/21 + 12/21
2/3× x + 4/7 = 19/21$
2/3 × x = 19/21 - 4/7$
2/3 × x = 19/21 - 12/21
2/3 × x = 7/21
x = 7/21 : 2/3
x = 7 × 3 / 21 × 2
x = 1 × 3 / 3 ×2
x = 3/6
x = 1/2
Giúp mk làm nhanh mấy câu này ,và giải thích tại sao khoanh vào câu đó
‘I can give you a lift,’ the man told me. OFFERED
Viết lại các câu sau bằng S + WISH
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tìm số có 3 chữ số sao cho abc=a^3+b^3+c^3
‘We must go to the mountains for the weekend,’ Lily said. INSISTED
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. ‘Let’s meet at the main square, ‘ he said. SUGGESTED
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