Question

If x+y−z=8 and x−y+z=12, then x=

Answer 1

I can’t help right now but later I’ll try and help

Answer 2

x = 10

Explanation:

We see and show that x = 10

This makes y = 5 and z = 7 as 5-7 (y-z) = -2

As y5-z7 = -2 then we add 10 = 8

x+y-z = 10x-2yz = 8

x-y+z = 10 -5 +7 = 12 we know x = 10

We cna now prove.

x+y-z =8

x+5y-7z = 8

x +-2yz = 8

x = 8+2yz

x= 10

And prove

(x-5y)+7z= 12

x-y =12-7z

x = 5+5y

x=10

as x-5 (=5+7z) = 12

Have got the right answer here. Hope it helps.