Question

Tìm X

A. 19,75+ 6,3 =34,25 -x :0,4

B. 20,2 x 4,3= X x 12,5 - 88,64

Answer 1

`a)19,75+6,3=34,25-x:0,4`

`x:0,4=34,25-19,75-6,3`

`x:0,4=8,2`

`x=8,2xx0,4=3,28`

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`b)20,2xx4,3=x xx12,5-88,64`

`x xx12,5=20,2xx4,3+88,64`

`x xx12,5=86,86+88,64=175,5`

`x=175,5:12,5`

`x=14,04`

Answer 2

a: 34,25-x:0,4=19,75+6,3

=>x:0,4=8,2

hay x=3,28

b: =>12,5x-88,64=20,2x4,3

=>12,5x=175,5

hay x=14,04

Answer 3

A. 19,75+ 6,3 =34,25 -x :0,4

=> 26.05 = 34,25 -x :0,4

=>   34,25 - 26.05 = x :0,4

=> 8.2 = x : 0,4

=> x = 0,4 x 8.2

=> x =3.28

B. 20,2 x 4,3= X x 12,5 - 88,64

=> 86.86 = X x 12,5 - 88,64

=> 86.86  + 88,64 = X x 12,5 

=> 175.5 =  X x 12,5 

=> x =  175.5  : 12,5 

=> x=14.04

Answer 4

a: 34,25-x:0,4=19,75+6,3

=>x:0,4=8,2

hay x=3,28

b: =>12,5x-88,64=20,2x4,3

=>12,5x=175,5

hay x=14,04