Câu hỏi của Dung Nguyễn Thị Mai

Question

Giả giúp mình vơi

Yeutoanhoc · Accepted Answer

`5/6-x=-3/7`

`=>x=5/6+3/7`

`=>x=53/42`

Vậy `x=53/42`.

`3x-2/5=1/2`

`=>3x=1/2+2/5`

`=>3x=9/10`

`=>x=3/10`

Vậy `x=3/10.`

Câu trả lời:

`5/6-x=-3/7`

`=>x=5/6+3/7`

`=>x=53/42`

Vậy `x=53/42`.

`3x-2/5=1/2`

`=>3x=1/2+2/5`

`=>3x=9/10`

`=>x=3/10`

Vậy `x=3/10.`

Nguyễn Lê Phước Thịnh · Answer

a) Ta có: $\dfrac{5}{6}-x=\dfrac{-3}{7}$

nên $x=\dfrac{5}{6}+\dfrac{3}{7}=\dfrac{35}{42}+\dfrac{18}{42}$

hay $x=\dfrac{53}{42}$

b) Ta có: $3x-\dfrac{2}{5}=\dfrac{1}{2}$

nên $3x=\dfrac{1}{2}+\dfrac{2}{5}=\dfrac{9}{10}$

hay $x=\dfrac{3}{10}$

Câu trả lời:

a) Ta có: $\dfrac{5}{6}-x=\dfrac{-3}{7}$

nên $x=\dfrac{5}{6}+\dfrac{3}{7}=\dfrac{35}{42}+\dfrac{18}{42}$

hay $x=\dfrac{53}{42}$

b) Ta có: $3x-\dfrac{2}{5}=\dfrac{1}{2}$

nên $3x=\dfrac{1}{2}+\dfrac{2}{5}=\dfrac{9}{10}$

hay $x=\dfrac{3}{10}$

x	10	-2	-3	1	0	1.21	0.25
\(^{x^2}\)	100	4	9	1	0	1.4641	0.0625

1.44	-25	\(\dfrac{4}{9}\)
2.0736	625	\(\dfrac{16}{81}\)