2.04*(0.5+x)=4.284 2.1*(0.5+x)=4.284
0.5х=4.284:2.04 0.5х=2.1 Х=2.1:0.5 Х=4.2 0.5х=4.284:2.1 0.5х=2.04 Х=2.04:0.5 Х=4.08