tìm x 158-(x+61) =82 (x-35)-125=0 185+ (138-x)=217 7x-15=713 x-72:18=12

`text{Đáp án}`

`x=15`

`x=160`

`x=106`

`x=104`

`x=16`

`text{Giải thích các bước giải:}`

`158-(x+61) =82`
`=>x+61=158-82`
`=>x+61=76`
`=>x=76-61`
`=>x=15`
`(x-35)-125=0`
`=>x-35=0+125`
`=>x-35=125`
`=>x=125+35`

`=>x=160`
`185+ (138-x)=217`
`=>138-x=217-185`
`=>138-x=32`
`=>x=138-32`
`=>x=106`
`7x-15=713`
`=>7x=713+15`
`=>7x=728`
`=>x=728:7`
`=>x=104`
`x-72:18=12`
`=>x-4=12`
`=>x=12+4`
`=>x=16`