Răspunsuri

2014-09-21T13:12:47+03:00
X-10x/10=A
A+5A/100=189  amplificam cu 100
100A+5A=18900
105A=18900
A=180

x-10x/100=180  amplificam cu 100
100x-10x=18000
90x=18000
x=200
1 5 1