24 + 18 : x = 23 + 7
24 + 18 : x = 30
18 : x = 30 - 24
18 : x = 6
x = 18 : 6
x = 3.
`24 + 18:x =23 + 7`
`24 + 18:x =30`
`18:x=30-24`
`18:x=6`
`x=18:6`
`x=3`
Vậy `x=3`
24 + 18 : x = 30
18 : x = 30 - 24
18 : x = 6
x = 18 : 6
x = 3
\(24+18:x=23+7\)
\(42:x=30\)
\(42=30\cdot x\)
\(42=30x\)
\(30x=42\)
\(x=42:30\)
\(x=\dfrac{7}{5}.\)
\(Vậy...\)