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=$\frac{3}{4}$