a) x-2/9=48/27 b) x+2/3=4/5 c) 7/9-x=1/3 d) x:2/3=9/8

2 câu trả lời

`a, x - 2/9 - 48/27 `

`⇔ x - 2/9 = 16/9`

`⇔ x = 16/9 + 2/9 `

`⇔ x = 18/9 `

`⇔ x=2`

`b, x+2/3 = 4/5 `

`⇔ x = 4/5 - 2/3`

`⇔ x = 12/15 - 10/15`

`⇔ x = 2/15`

`c, 7/9 -x=1/3`

`⇔ x = 7/9 - 1/3`

`⇔ x = 7/9 - 2/9`

`⇔ x = 5/9`

`d, x:2/3 = 9/8`

`⇔ x = 9/8 xx 2/3`

`⇔ x = 3/4`

 

a)x-$\frac{2}{9}$ =$\frac{48}{27}$ 

x=$\frac{48}{27}$ +$\frac{2}{9}$ 

x=2

b)x+$\frac{2}{3}$ =$\frac{4}{5}$ 

x=$\frac{4}{5}$ -$\frac{2}{3}$ 

x=$\frac{2}{15}$ 

c)$\frac{7}{9}$ -x=$\frac{1}{3}$ 

x=$\frac{7}{9}$ -$\frac{1}{3}$ 

x=$\frac{4}{9}$ 

d)x:$\frac{2}{3}$ =$\frac{9}{8}$ 

x=$\frac{9}{8}$ .$\frac{2}{3}$ 

x=$\frac{3}{4}$ 

 

Câu hỏi trong lớp Xem thêm

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