Question

Please help asap 15 pts

Answer 1

First of all, the minus sign before the parenthesis changes the sign of all the terms inside:

$3y-(y+2x)+x = 3y-y-2x+x$

Now, we can sum like terms:

$3y-y = 2y,\quad -2x+x = -x$

So, the final expression is

$2y-x$