50 : x - 20 : x = 10
(50 - 20) : x = 10
30 : x = 10
x = 30 : 10
x = 3
50:x - 20:x=10
(50 - 20):x=10
30:x=10
x=30:10=3
Tích nha
(50-20):x=10
30 : x = 10
x = 30 : 10
x= 3
( 50 - 20 ) : x = 10
30 : x = 10
x = 30 : 10
x = 20
50 : x - 20 : x = 10
( 50 - 20 ) : x = 10
30 : x = 10
x = 30 : 10
x = 3
\(50\div x-20\div x=10\)
\(\left(50-20\right)\div x=10\)
\(30\div x=10\)
\(x=30\div10\)
\(x=3\)
50 : x - 20 : x = 10
( 50 - 20 ) : x = 10
30 : x = 10
x = 30 : 10
x = 3