Odpowiedzi

2009-11-04T21:16:37+01:00
A)80%x= 10
b)20%y= 20
c)120%a =30
d)140%b= 40
2009-11-04T21:20:06+01:00
A)10-80%
x-100%
80%x=10*100%
x=10*100%/80%
x=1000/80
x=12,5
2009-11-04T21:41:55+01:00
A)x-0,20x=10
0,8x=10
b)y-0,80y=20
0,20y=20
c)a+0,20a=30
1,20a=30
d)b+0,40b=40
1,4b=40