Question

Use the substitution method to solve the system of equations. Choose the correct ordered pair.

2x - y = 8
y = x - 3

Answer 1

replace y by \(x-3\) in the first equation and solve
\[2x-(x-3)=8\] for x

Answer 2

It's a very easy method. We have to replace the value.
By the 2nd line, we can infer that 2x - (x - 3) = 8
\[2x - x + 3 = 8\]
\[x + 3 = 8\]
\[x = 5\]
We know that y is x-3, so y = 2