Question

Solve the system by substitution.
y = x
y = 23 - 8

Answer 1

X=15, Y=15
X=Y so they are the same thing
Y=23-8
23-8=15

Answer 2

x=15, y=15

Explanation:

y=23-8

y=x, thus x=23-8 and y and x are the same thing (given from the first equation)

23-8=15

So, y and x are both 15