Question

1500 : [ ( 30x + 40 ) : x ] = 30

Answer 1

\(1500:\left[\left(30x+40\right):x\right]=30\)

\(\Leftrightarrow\left(30x+40\right):x=50\)

\(\Leftrightarrow30x+40=50x\)

\(\Leftrightarrow50x-30x=40\)

\(\Leftrightarrow20x=40\)

\(\Leftrightarrow x=2\)

Vậy ..

Answer 2

1500 : [ ( 30x + 40 ) : x ] = 30

[ ( 30x + 40 ) : x ] = 1500 : 30

[ ( 30x + 40 ) : x ] = 50

( 30x + 40 ) = 50 . x

( 30x + 40 ) = 50x

40 = 50x - 30x

40 = 20x

x = 40 : 20

x = 2

Vậy x = 2