All you need to do is distribute the 8 into each of the terms in the parenthesis.
Your equation will then become
32x + 48y - 24z
$70/$32.55=$37.45 the amount of money she spent on coffee. We can divide that amount by $7.49 to see how many pounds she brought $37.45/$7.49=5
She brought 5 pounds of coffee.
I'm pretty sure it's (-5, -4).
btw i hate math too :))
