Y=(7-z)/2 because 2y+z=7.

Because 2x+y = 2 * (3-z)+(7-z)/2 = 2.

The solution is z=5/3..X generation =- 1/3. Y = 8/3。

Answer; X is-1/3. Y is 8/3 and z is 5/3.

2。 Solutions; x/2=y/3=z/5 x/2=y/3 x=2y/3

y/3=z/5 z=5y/3

So 2x+y+3z=2*2y/3+y+3*5y/3=88.

If y= 12, then x = 2 *12/3 = 8 z = 5 *12/3 = 20.

Answer; X is 8. Y is 12. Z is 20.