Question

tìm x 

2/9 + 7/9 : x = 1/18

x x 7/5 - 2/5 = 2/15 

4/7 x ( x - 1/2 ) = 3/14

2/5 x x + 3/10 x x - x : 5 = 7/10

Answer 1

a: =>7/9:x=1/18-2/9=1/18-4/18=-3/18=-1/6

=>x=-7/9:1/6=-7/9*6=-42/9=-14/3

b: =>x*7/5=2/15+2/5=8/15

=>x=8/15:7/5=8/21

c: =>x-1/2=3/14:4/7=3/8

=>x=3/8+4/8=7/8

d: =>0,4x+0,3x-0,2x=0,7

=>0,5x=0,7

=>x=1,4

Answer 2

7/10

 

Answer 3

MG42E3RSDáidsdPDIOHSA8DR0RYE9FHEUCnd09f7eqg03

Answer 4

DáiDáiDáiDáiDáiDáiDáiDáiDáiDái