Tìm x biết a) x+245 = 43 .11 b) x- 382 = 159 : 3 c) 3.(x- 2 ) + 150 = 240 d) (x+ 3 ) : 5 = 12 5* choa tất cả các câu tl

a,

`x+245=43.11`

`->x+245=473`

`->x=473-245`

`->x=228`

Vậy `x=228`

b,

`x-382=159:3`

`->x-382=53`

`->x=53+382`

`->x=435`

Vậy `x=435`

c,

`3(x-2)+150=240`

`->3(x-2)=240-150`

`->3(x-2)=90`

`->x-2=90:3`

`->x-2=30`

`->x=30+2`

`->x=32`

Vậy `x=32`

d,

`(x+3):5=12`

`->x+3=12×5`

`->x+3=60`

`->x=60-3`

`->x=57`

Vậy `x=57`