I'm not sure if the problem was cut off to the right, but with the expression [tex]8y + 5x - 3y + 7 - 2x[/tex], we can dissect it into different sections.
We have: [tex]5x, -2x[/tex]; [tex]8y, -3y[/tex]; and 7.
We can then start combining them together. We have the end result of [tex]3x, 5y[/tex], and 7. Putting that into an equation, we have the end result of 5y + 3x + 7, or answer A.