1)60,8: (5,3x-2,15)=5 2)(10-2,1x):1,37=5
60.8/(5.3х-2.15)=5 5.3х-2.15=60.8/5=12.16 5.3х=14.31 х=2.7 (10-2.1х)/1.37=5 10-2.1х=6.85 -2.1х=-3.15 х=1.5