Question

5x+[2y-{3y+5(2x-y)}-2(5y-x)]

Answer 1

5x+[2y-{3y+5(2x-y)}-2(5y-x)}.]

= 5x+[2y-{3y+10x-5y}-10y+2x.]

= 5x+2y-3y-10x+5y-10y+2x.

= 5x+2x-10x +2y+5y-3y-10y.

=7x-10x +7y-13y.

= -3x-6y.

=-3(x+2y).

Hope it helps.

Answer 2

$5x + 2y - (3y + 5(2x - y) - 2(5y - x) \\ = 5x + 2y - 3y - 10x + 5y - 10y + 2x \\ = (5x - 10x + 2x) + (2y - 3y + 5y - 10y) \\ = ( - 3x) + (-6y) \\ = (-3(x+2y)).$
hope this is beneficial to u.