Question

40% din 85=x
20% din x=80
x% din 300=225​

Answer 1

40/100 · 85=x

2·85/5=x

2·17=x

x=34

20/100 · x=80

x/5=80

x=5·80

x=400

x/100·300=225

3x=225

x=225:3

x=75

Succes!

Answer 2

Răspuns:

40%×85=x

40/100 × 85 =x

simplifici si da

2×17=x

34=x

20% × x=80

20/100 × x=80

simplifici

x/5=80

le inmultesti in diagonală

80×5=x

400=x

x% × 300=225

x/100 × 300=225

3x=225

x=225/3

x=75