60%+x+0,4+x+x:3=2

3/5+x+2/5+x+x.1/3=2

(3/5+2/5)+x.(1+1+1/3)=2

1+x.10/3=2

suy ra x.10/3=1

x=1:10/3

x=3/10

vậy x=3/10 nha

60%.x+0,4.x+x:3=2

\(\frac{3}{5}\).x+\(\frac{2}{5}\).x+x:3=2

x.(\(\frac{3}{5}\)+\(\frac{2}{5}\))+x:3=2

x.1+x.\(\frac{1}{3}\)=2

x.(1+\(\frac{1}{3}\))=2

x.\(\frac{4}{3}\)=2

x=2:\(\frac{4}{3}\)

x=\(\frac{3}{2}\)

\(60\%x+0,4x+x:3=2\\ \Leftrightarrow\left(60\%+0,4+\dfrac{1}{3}\right)x=2\\ \Rightarrow\dfrac{4}{3}x=2\\ \Rightarrow x=\dfrac{3}{2}\)

\(60\%x+0,4x+x:3=2\) 

\(x.\left(60\%+0,4+\dfrac{1}{3}\right)=2\) 

                          \(x.\dfrac{4}{3}=2\) 

                              \(x=2:\dfrac{4}{3}\) 

                              \(x=\dfrac{3}{2}\)

\(60\%\cdot x+0,4\cdot x+x:3=2\)

\(x\cdot\left(60\%+0,4+\frac{1}{3}\right)=2\)

\(x\cdot\frac{4}{3}=2\)

\(x=2:\frac{4}{3}=\frac{3}{2}\)

BÀI 2

60%.x + 0,4.x + x:3= 2

\(\frac{60}{100}\)x + \(\frac{4}{10}\).x + x. \(\frac{1}{3}\)=2

\(\frac{3}{5}\).x + \(\frac{2}{5}\).x + x.\(\frac{1}{3}\)=2 

(\(\frac{3}{5}\)+ \(\frac{2}{5}\)+ \(\frac{1}{3}\)) .x =2

\(\frac{4}{3}\).x                          =2

        x                            = 2: \(\frac{4}{3}\)

          x                          = \(\frac{3}{2}\)

Vậy x=\(\frac{3}{2}\)

k cho mik nha các bạn

Bài 2 :

60%x + 0.4x + x : 3 = 2

\(x.\left(\frac{60}{100}+\frac{2}{5}+\frac{1}{3}\right)\)= 2

\(x.\frac{4}{3}\)= 2

\(x=2.\frac{3}{4}\)

\(x=1.5\)

dấu nhân hay X v e?

2,5

2.5

Câu 19: B

Câu 20: A

9: =>x-3=2

=>x=5

10: =>x+1/2=1/5 hoặc x+1/2=-1/5

=>x=-7/10 hoặc x=-3/10

12:

a: =>x^2=900

=>x=30 hoặc x=-30

b: =>x=1/18*27=3/2

7: =>|x-0,4|=1,1

=>x-0,4=1,1 hoặc x-0,4=-1,1

=>x=1,5 hoặc x=-0,7