Question

PLEASE HELP!!!!!!!!!!

Answer 1

Here's the ?

Answer 2

Well just as they say...you take either of the original equations

\[\large 4x - 7y = 28\]
or
\[\large 6x - 5y = 31\]

And plug in y = -2 that they found

So lets take the first equation

\[\large 4x - 7y = 28\]

If we know that y = -2 we have

\[\large 4x - 7(-2) = 28\]
\[\large 4x + 14 = 28\]

What does x = ?