0,5/1,63=9,2-x/16,3
1/2/163/100=46/5-x/163/10
50/163=46-5x/5/163/10
50/163=(46-5x)*2/163
50/163=92-10x/163
50=92-10x
10x=92-50
10x=42
x=21/5
2045639 / (6700 – 6279) + 783 × (66161 – 65752) = 325106
(10+7)*4=4*10+4*7=40+28=68
(2+30)*2=2*2+2*30=4+60=64
(23+7)*3=3*23+3*7=69+21=90
(m*n)(15/44*28/45)= (m*n)(28/132)= 28/132mn