6: =>x=9/10+1/5=9/10+2/10=11/10

7: =>x=3/8-5/12=36/96-40/96=-1/24

8: =>x=7/6-5/4=14/12-15/12=-1/12

9: =>x=1/35+2/7=1/35+10/35=11/35

10: =>x=2/7-7/10=20/70-49/70=-29/70

1, \(x=-\dfrac{5}{3}-\dfrac{1}{2}=-\dfrac{10}{6}-\dfrac{3}{6}=-\dfrac{13}{6}\)

2, \(x=\dfrac{1}{3}-\dfrac{3}{5}=\dfrac{5-9}{15}=-\dfrac{4}{15}\)

4, \(x=-\dfrac{7}{9}+\dfrac{4}{3}=\dfrac{-7+12}{9}=\dfrac{5}{9}\)

5, \(x=\dfrac{5}{6}-\dfrac{7}{3}=\dfrac{5-14}{6}=-\dfrac{9}{6}=-\dfrac{3}{2}\)

6, \(x=\dfrac{9}{10}+\dfrac{1}{5}=\dfrac{9+2}{10}=\dfrac{11}{10}\)

7, \(x=\dfrac{3}{8}-\dfrac{5}{12}=\dfrac{9-10}{12}=-\dfrac{1}{12}\)

8, \(x=\dfrac{7}{6}-\dfrac{5}{4}=\dfrac{14-15}{12}=-\dfrac{1}{12}\)

9, \(x=\dfrac{1}{35}+\dfrac{2}{7}=\dfrac{1+10}{35}=\dfrac{11}{35}\)

10, \(x=-\dfrac{7}{10}+\dfrac{2}{7}=\dfrac{-49+20}{70}=\dfrac{-29}{70}\)

Zui lòng chia nhỏ

1: =>x=-5/3-1/2=-13/6

2: =>x=1/3-3/5=-4/15

4: =>x=-7/9+4/3=-7/9+12/9=5/9

5: =>x=5/6-7/3=5/6-14/6=-9/6=-3/2

6: =>x=9/10+1/5=11/10

7: =>x=3/8-5/12=36/96-40/96=-1/24

8: Đề sai rồi bạn

ai giúp t vs

\(A=\frac{7}{11}\cdot\frac{-39}{190}\cdot\frac{76}{21}=\frac{-39\cdot7\cdot76}{11\cdot190\cdot21}=\frac{-273}{550}\)

B=\(\left(\frac{5}{8}+\frac{4}{5}\right)\)\(\cdot\left(2-\frac{2}{107}\right)\)

=>B=\(\frac{57}{40}\cdot\frac{212}{107}=\frac{57\cdot212}{40\cdot107}=\frac{3021}{1070}\)

100 kết quả cuối cùng

Các bạn nhớ làm rõ các bước ra nhé

=107-{38+[7.9-24:6+(9-343]}:15

=107- {38+[7.9-24:6+-334]}:15

=107-{38+-322}:15

=107--284:15

=107--18,93333333

=117,9333333

n.(2x-5)²=9

(2x-5)²=3²

* 2x-5=3       * 2x-5=-3

2x=3+5           2x=-3+5

2x=8               2x=2

  x=8:2              x=2:2

  x=4                 x=1

vậy x=4 hoặc x=1

o.(1-3x )³=-8 

(1-3x)³=(-2)³

1-3x=-2

3x=1-(-2)

3x=3

  x=3:3

  x=1

vậy x=1

647 - [6. (107 . 8 - 7 . 2³) + 5 . 2⁵ : 2⁴ ]

= 647 - [6. (856 - 7 .8) + 5 . 2 ]

= 647 - [6. (856 - 56) + 5 . 2]

= 647 - [6. 800 + 5 . 2]

= 647 - [ 4800 + 10]

= 647 - 4810 

= -4163

-4153 ạ

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