Question

fie sirul de rapoarte egale
xsupra3=ysupra4=zsupra5
a)x+y+z=24
b)2x+3y+4z=76
c)y-z=3

Answer 1

c)5-4=3
1=3
3•1=3
a)3+4+5=75
7+5=75
12=75
75:12=6.25