Răspuns:
40/100 * 60/100 * y + 60/100 * t + 50/100 * 60/100 * t + t =321
6/25 *t + 3/5 * t + 3/10 * t + t = 321
aducem la acelasi numitor..
(12+30+15+50)* t / 50 = 321* 50 /50
(42+65)* t = 16.050
107t = 16.050
t = 150
y = 150*60/100
y = 90
x = 90*40/100
x = 36
z = 90/2
z = 45
...
