`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`
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
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
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
