Question

Determinati x,y,z stiind:x+y=5000,y+z=7000,x+y=z=9000

Answer 1

x+y+z=9000

x+y=5000

5000+z=9000

z=9000-5000

z=4000

x+y+z=9000

y+z=7000

x+7000=9000

x=9000-7000

x=2000

x+y=5000

2000+y=5000

y=5000-2000

y=3000

Answer 2

Răspuns:

x=2000; y=3000; z=4000

Explicație pas cu pas:

x+7000=9000

x=9000-7000

x=2000

x+y=5000

2000+y=5000

y=5000-2000

y=3000

y+z=7000

3000+z=7000

z=7000-3000

z=4000