Question

If x = y + z and x + y =6 and x = 10, then z = _____?

Answer 1

Here you go, hope this helps
the answer is c

Answer 2

X+y=6
x=10

10+y=6
y=-4

10=-4+z
-4+z=10
z=10+4
z=14

So the correct answer is 14