Question

x+y=50,y+z=75,x+z=65,simultan,atunci ce valoare are x,y si z?

Answer 1

=x+y=50,,,,y+z=75,,,,x+z=65
x+y+y+z+x+z=50+75+65
2x+2y+2z=190
x+y+z=190:2=95
50+z=95
z=95-50=45
y+z=75=y+45=75
y=75-45=30
x+y=50=x+30=50
x=50-30=20
V=x+y=50=20+30=50
y+z=75=30+45=75
x+z=65=20+45=65