Question

2
solve the system of equations by substitution:
$x - y = 7$
$x - y = -4$

Explanation:

Step1: Rearrange first equation

$x = y + 7$

Step2: Substitute into second equation

$(y + 7) - y = -4$

Step3: Simplify the equation

$7 = -4$

Step4: Analyze the result

This is a false statement, meaning no solution exists.

Answer:

There is no solution to the system of equations.