what is y=x-2 , when y=2x ?
what is y=x-2 , when y=2x?
Substituting the value of y from the second equation
into the first equation gives:
y = x - 2
2x = x - 2
2x -x = x - 2 - x
x = -2
Now, using that in the second equation:
y = 2x
y = 2(-2)
y = -4
Substituting that into the first equation:
y = x - 2
-4 = -2 - 2
-4 = -4