1. x/4=3
2/x =1
2.  x:103,2=5.6:17,2
11 1/5: 7=10 1/2:x

х/4=3х=122/х=1х=2х÷103,2=5,6÷17,2х×17,2=5,6×103,2х=577,92÷17,2х=33,611 1/5÷7=10 1/2÷х11,2÷7=10,5÷х11,2х=10,5×7х=73,5÷11,2х=6,5625