Question

gấp ạ

Answer 1

`x xx3/4-3/8 xx x+x xx15/24=999`

`x xx(3/4-3/8+15/24)=999`

`x xx(18/24-9/24+15/24)=999`

`x xx24/24=999`

`x xx1=999`

`x=999:1=999`

Answer 2

a,x.3/4-3/8.x+x.15/24=999

x.(3/4-3/8+15/24)=999

x.1=999

x=999:1

x=999