Question

Y = 2x - 8
x-y=3
What is X and Y

Answer 1

You can isolate the second equation and use substitution into the first equation:

x-y=3
x=y+3

y=2x-8
y=2(y+3)-8
y=2y+6-8
-y=-2
y=2

Plug this back into the second equation to solve for x:

x-y=3
x-2=3
x=5

So x=5 and y=2 is the answer.

Answer 2

x = 5

y = 2

Explanation:

In this question, you will have to use one of the equations to find the value of x in terms of y and substitute it in the other equation or vice versa.

y = 2x - 8

x - y = 3

Use the second equation to find the value of x in terms of y.

x - y = 3

x = y + 3

Now that we found that, we can substitute it in the other equation.

y = 2 (y + 3) - 8

y = 2y + 6 -8

y = 2y -2

y + 2 = 2y

y = 2

Now that we got y we can substitute the value in any of the equations to find x.

x - 2 = 3

x = 5