\(x+65,27=72,6\)

\(x=72,6-65,27\)

\(x=7,33\)

-------------------------------------

\(x-43,502=21,73\)

\(x=21,73+43,502\)

\(x=65,232\)

-------------------------------------

\(x\times6,3=187\)

\(x=187:6,3\)

\(x=\dfrac{1870}{63}\)

--------------------------------------

\(1602:x=7,2\)

\(x=1602:7,2\)

\(x=222,5\)

ai nhanh ho tui c

x x là sao????

là chia

a/ x+65,27=72,6

    x=72,6-65,27

     x=7,33

b/x-43,502=21,73

            x=21,73+43,502

              x=65,232

c/x.6,3=187

           x=187:6,3

           x=29,682....

d/ 1602:x=7,2

           x=1602:7,2

           x=222,5

\(X+65,27=72,6\\ X=72,6-65,27=7,33\\ ---\\ X-43,502=21,73\\ X=21,73+43,502=65,232\\ ---\\ X.6,3=187\\ X=\dfrac{187}{6,3}=\dfrac{1870}{63}\\ ---\\ 1602:X=7,2\\ X=1602:7,2=222,5\)

x:3,7=25,6x3

x:3,7=76.8

x=76.8 x 3.7

x=284.16

\(x:\dfrac{3}{7}=25,6\times3\)

\(x:\dfrac{3}{7}=76,8\)

\(x=76,8\times\dfrac{3}{7}\)

\(x=\dfrac{1152}{35}\)

x:3,7=25,6x3

x:3,7=76,8

x = 76,8 * 3,7

x = 284,16

1282.05 +12.95  = 1295

=1282,05 + 12,95
=      1295

1295

x + 4,5 = 15,4 x 2,3

x + 4,5 = 35,42

x          = 35,42 - 4,5 

x          = 30,92 

x : 3,7 - 25,6 x 3 = ?

x + 4,5 = 15,4 x 2,3

x + 4,5 = 35,42

x          = 35,42 - 4,5 

x          = 30,92 

 phần b thì mk chịu 

30,92

B chịu

\(x:\dfrac{4}{7}=\dfrac{6}{7}-\dfrac{1}{3}\\ \Rightarrow x:\dfrac{4}{7}=\dfrac{18}{21}-\dfrac{7}{21}\\ \Rightarrow x:\dfrac{4}{7}=\dfrac{11}{21}\\ \Rightarrow x=\dfrac{11}{21}\times\dfrac{4}{7}\\ \Rightarrow x=\dfrac{44}{147}\)

\(x\div\dfrac{4}{7}=\dfrac{6}{7}-\dfrac{1}{3}\)

\(x\div\dfrac{4}{7}=\dfrac{11}{21}\)

\(x=\dfrac{11}{21}\times\dfrac{4}{7}\)

\(x=\dfrac{44}{147}\)

=>x:4/7=18/21-7/21=11/21

hay x=44/147

\(x-\dfrac{3}{5}=\dfrac{2}{3}\times\dfrac{1}{5}\\ \Rightarrow x-\dfrac{3}{5}=\dfrac{2}{15}\\ \Rightarrow x=\dfrac{2}{15}+\dfrac{3}{5}\\ \Rightarrow x=\dfrac{2}{15}+\dfrac{9}{15}\\ \Rightarrow x=\dfrac{11}{15}\)

=>x-3/5=2/15

hay x=11/15

x-3/5=2/3 x1/5

x-3/5=2/15

x=2/15+3/5

x=2/15+9/15

x=11/15

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