Question

Ex 7, va rog. Ofer coroana! ​

Answer 1

Explicație pas cu pas:

x+10y+8z=62 => x=62-10y-8z=>x=2(31-5y-4z) =>

2|x cum x-prim => x=2

2+10y+8z=62 => 10y+8z=60 => 5y+4z=30 => 5y=2(15-2z)=>

2|5y => 2|y => y=2 (z prim)

=>4z=20=> z=5 (verifica prim)

=> x=2 y=2 z=5

3x+y+6z=39 =>y=39-3x-6z => y=3(13-x-2z)=>

3|y => y=3 (y prim)

3x+3+6z=39 => 3x+6z=36 => x+2z=12 => x=12-2z =>

x=2(6-z) => 2|x x-prim => x=2

=> 2z=10 =>z=5 verifica ca e prim

=> x=2 y=3 z=5