Question

-8ху+4у-4х-3у+2х+8ху
х=-4,4
у=10,3

Answer 1

$\displaystyle \tt -8xy+4y-4x-3y+2x+8xy=\bold{y-2x}$

$\displaystyle \tt y-2x=10,3-2\cdot(-4,4)=10,3+8,8=\underline{\bold{19,1}}$