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14 tháng 8 2015

\(2-\left(\frac{5}{3}+x-7\frac{5}{24}\right):16\frac{2}{3}=0\)

\(\Rightarrow2-\left(\frac{5}{3}+x-\frac{173}{24}\right)=16\frac{2}{3}.0=0\)

\(\Rightarrow\frac{5}{3}+x-\frac{173}{24}=2\)

\(\Rightarrow1\frac{2}{3}+x=2+\frac{173}{24}=9\frac{5}{24}\)

\(\Rightarrow1\frac{2}{3}+x=9\frac{5}{24}\Rightarrow x=9\frac{5}{24}-1\frac{2}{3}\Rightarrow x=\frac{181}{24}=7\frac{13}{24}\)

\(1-\left(5\frac{3}{8}+x-7\frac{5}{24}\right):16\frac{2}{3}=0\)

\(\Rightarrow1-\left(\frac{43}{8}+x-\frac{173}{24}\right):\frac{50}{3}=0\)

\(\Rightarrow\left(\frac{43}{8}+x-\frac{173}{24}\right):\frac{50}{3}=1\)

\(\Rightarrow\frac{43}{8}+x-\frac{173}{24}=\frac{53}{3}\)

\(\Rightarrow\frac{43}{8}+x=\frac{53}{3}+\frac{173}{24}\)

\(\Rightarrow\frac{43}{8}+x=\frac{199}{8}\)

\(\Rightarrow x=\frac{199}{8}-\frac{43}{8}\)

\(\Rightarrow x=\frac{156}{8}=\frac{39}{2}\)

24 tháng 3 2019

\(1-\left(5\frac{3}{8}+x-7\frac{5}{24}\right):16\frac{2}{3}=0\)

\(< =>1-\left(\frac{43}{8}+x-\frac{173}{24}\right):\frac{50}{3}=0\)

\(< =>1\left(\frac{43}{8}+x-\frac{173}{24}\right)=0\)

\(< =>\frac{43}{8}+x-\frac{173}{24}=0\)

\(< =>\frac{43}{8}+x=\frac{173}{24}\)

\(< =>x=\frac{173}{24}-\frac{43}{8}\)

\(< =>x=\frac{11}{6}\)

20 tháng 9 2015

\(2-\left(5\frac{3}{8}+x-7\frac{5}{24}\right)\)\(:16\frac{2}{3}=0\)

\(\Rightarrow\)\(2-\left(5\frac{3}{8}+x-7\frac{5}{24}\right)=0\)

\(\Rightarrow\)\(5\frac{3}{8}+x-7\frac{5}{24}=2\)

\(\Rightarrow5\frac{3}{8}+x=9\frac{5}{24}\)

\(\Rightarrow x=3\frac{5}{6}\)

( Cách làm thì đúng rồi nhưng đáp án tớ ko chắc chắn )

24 tháng 10 2017

a, 7/5 : x + 3/2 = 16/3

7/5 : x = 16/3 - 3/2

7/5 : x = 23/6

x = 7/5 : 23/6

x = 42/115

b, x : 1/5 + 1/7 = 3/5 . 18/21

x : 1/5 + 1/7 = 18/35

x : 1/5 = 18/35 - 1/7

x : 1/5 = 13/35

x = 13/35 . 1/5

x = 13/175

c, x - 1 và 1/3 : 2 = 5/7

x - 4/3 : 2 = 5/7

x - 4/3 = 5/7 . 2

x - 4/3 = 10/7

x = 10/7 + 4/3

x = 58/21

d, x + 2 và 3/5 . 1/6 = 35/36

x + 13/5 . 1/6 = 35/36

x + 13/5 = 35/36 : 1/6

x + 13/5 = 35/6

x = 35/6 - 13/5

x = 97/30

e, ( x + 3/2 ) : 2 = 7/10 + 1/5

( x + 3/2 ) : 2 = 9/10

x + 3/2 = 9/10 . 2

x + 3/2 = 9/5

x = 9/5 - 3/2

x = 3/10

1.

( 10 - 9,34 ) + ( 10 - 9,66 )

= 0,66 + 0,34

= 1

12 - ( 12 - 9,36 ) 

= 12 - 2,64

= 9,36

38,52 + 0,302 x 100 - 0,72

= 38,52 + 30,2 - 0,72

= 68,72 - 0,72

= 68

2.

\(1-\left(5\frac{3}{8}+x-7\frac{5}{24}\right):16\frac{2}{3}=0\)

\(1-\left(\frac{43}{8}+x-\frac{173}{24}\right):\frac{50}{3}=0\)

\(\left(\frac{43}{8}+x-\frac{173}{24}\right):\frac{50}{3}=0+1=1\)

\(\left(x-\frac{151}{12}\right):\frac{50}{3}=1\)

\(x-\frac{151}{12}=1\times\frac{50}{3}\)

\(x-\frac{151}{12}=\frac{50}{3}\)

\(x=\frac{50}{3}+\frac{151}{12}\)

\(x=\frac{117}{4}\)

Bài 1

\(\left(10-9,34\right)+\left(10-9,66\right)\)

\(=0.66+0,34=1\)

\(12-\left(12-9,36\right)\)

\(=12-2.64=9,36\)

\(38,52+0,302.100-0,72\)

\(=38,52+30,2-0,72\)

\(=7.6\)

Bài 2

\(1-\left(5\frac{3}{8}+x-7\frac{5}{24}\right):16\frac{2}{3}=0\)

\(1-\left(\frac{43}{8}+x-\frac{173}{24}\right):\frac{50}{3}=0\)

\(\left(\frac{43}{8}+x-\frac{173}{24}\right):\frac{50}{3}=1\)

\(\frac{43}{8}+x-\frac{173}{24}=\frac{3}{50}\)

\(\frac{43}{8}+x=\frac{3}{50}+\frac{173}{24}\)

\(\frac{43}{8}+x=\frac{4361}{600}\)

\(x=\frac{142}{75}\)( gửi lại bài 2 đã ) 

8 tháng 4 2017

minh ko biet nua moi lop 4 thoi