Răspunsuri

2014-05-06T14:16:59+03:00
S- suma
d- diferenta

s=29
s:d=5.4
s=5d+4
5d+4=29
5d=29-4
5d=25
d=5

a+b=29
a-b=5=> a=5+b
5+b+b=29
2b=29-5
2b=24
b=12

a=12+5
a=17