30 - x : 4 x 5 = 20
x : 4 x 5 = 30 -20
x :4 x 5 = 10
x : 4 = 10 : 5
x : 4 = 2
x = 2x4
x = 8
Vậy x = 8
30 - x : 4 x 5 = 20
x : 4 x 5 = 30 - 20 = 10
x : 4 = 10 : 5 = 2
x = 2 x 4 = 8
học tốt ~~~
30 - x : 4 x 5 = 20
\(x:4\times5=30\)\(-20\)
\(x:4\times5=10\)
\(x:4=10:5\)
\(x:4=2\)
\(x=2\times4\)
\(x=8\)
Đáp số: x = 8
30 - x : 4 × 5 = 20
x : 4 × 5 = 30 - 20
x : 4 × 5 = 10
x : 4 = 10 : 5
x : 4 = 2
x = 2 × 4
x = 8
30 - x : 4 x 5 = 20
x : 4 x 5 = 30 - 20
x : 4 x 5 = 10
x : 4 = 10 : 5
x : 4 = 2
x = 2 x 4
x = 8
x : 4 x 5 = 10
x : 4 = 10 : 5
x : 4 = 2
x = 2 x 4
x = 8
Vậy x = 8