prorab75

Verified answer

2,4 : x = 4.5 :30 (45:300)
2,4:х=0,15
х=2,4:0,15
х=16


x : 3.5 = 0.5 : 20(5:200)
х:3,5=0,025
х=0,025х3,5
х=0.0875