Raportul intre veniturile unor parinti este de 7/10 iar diferenta lor insutitul lui 3 .determina sumele in lei. Va rog ajutati -ma.!!!!!!!!!!!

1
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Răspunsuri

2014-06-03T17:05:40+03:00
A si b veniturile unor parinti
a/b=7/10
a-b= insutitul lui 3
a-b=300

a/b=7/10=>7b=10a
b=10a/7
a-10a/7=300
aducem la acelasi numitor
7a-10a=300
-3a=300x7
3a=2100
a =2100/-3
a=  - 700 lei
-700-b=300
 -b=300 +700
 -b=1000
 b= -1000
un parinte are salarul de 1000lei (b) ,iar celalalt de 700 lei raportul lor fiind de 700/1000=7/10
diferenta este 1000lei - 700 lei=300 lei
 


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