mình cảm ơn cần gấp ạ

Câu 1:

`( x - 4 ) : 6 - 5 = 10`

`( x - 4 ) : 6 = 10 + 5 = 15`

`( x - 4 ) = 15 × 6 = 90`

`x = 90 + 4 = 94`

`-` Vậy `x = 94`

`=> C`

Câu 2:

`36 - 18 : 2 × 3`

`= 36 - 9 × 3`

`= 36 - 27`

`= 9`

`=> D`

Câu 3:

`( 56 × 35 + 56 × 18 ) : 53`

`= [ 56 × ( 35 + 18 ) ] : 53`

`= [ 56 × 53 ] : 53`

`= 56 × 53 : 53`

`= 56 × 1`

`= 56`

`=> D`

`@``T``i``n``a`