Question

stiind ca x+y=2015 si x+y+z=5102,calculeaza:z-(x+y)=? si 10.000-(x+y+z)-u=0;u=?

Answer 1

x+y =2015
x+y+z = 5102 ⇒ 2015+z=5102 ⇔ z=3087
z-(x+y)= 3087- 2015 = 1072

10000-(x+y+z)- u=0 ⇔ 10.000-5102-u=0 ⇔4898-u=0 ⇔u =4898