Răspuns:
Explicație pas cu pas:
a)x=10×9=90
b)x=6/5
c)x=0
d)x=0,4/1,75=40/175=8/35
e)182/630=x/8 26/90=x/8 13/45=x/8 x =13×8/45=2,3(1)
f)1,2/x=72/2 x=36/1,2 x=30
g)x=2·31/5·9=62/45=1.3(7)
i)23/9·100/5=2·23/x x=9·5·2/100=9/10=0,9
