Question

subtract -3xy + 2x +1 - (-1xy +1y-3)​

Answer 1

$\tt {-3xy + 2x + 1 - ( -1xy + 1y - 3 )}$

$\tt {= -3xy + 2x + 1 + 1xy - 1y + 3 }$

$\tt{= -3xy + 1xy + 2x + 1 + 3 - 1y}$

$\tt {= -2xy + 2x + 4 - 1y}$