(5x - 1,3) * 25,4 = 52,07

(5х-1,3)*25,4=52,07 (5х-1,3)=52,07:25,4 5х-1,3=2,05 5х=2,05+1,3 5х=3,35 х=0,67 (5*0,67-1,3)*25,4=3,35-1,3=2,05*25,4=52,07