32,4:(7,06х-101,2)*1,8=1,458
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32,4:(7,06х-101,2)*1,8=1,458;

32,4:(7,06х-101,2)=1,458:1.8;

32.4:(7.06x-101.2) = 0.81;

7.06x - 101.2 = 32.4 : 0.81;

7.06x - 101.2 = 40;

7.06x = 141.2;

x = 20;