Question

It is known that x+y=10 and that x=y Show that z+y=10 ? justify each stape

Answer 1

$x = y \\ = 10 \\ z = y - 10 = 0$

Answer 2

x+y=10 and x=y so the value of x and y will be 5
so 5+5=10
The value of y is 5 so we have to find value of z
z+5=10
z=10-5
z=5
so the value of z is 5