Question

Calcule me ajudem !!!

Answer 1

(2x/1 - 1/2 - 1/6.y ) - ( - 1/2.xy -1/9.y + 1/4.x ) =
2x/1 - 1/2 - y/6  + xy/2  + y/9 -  x/4 =
mmc = 36
( 72x - 18 - 6y  + 18xy + 4y - 9x) / 36 =
72x - 9x - 6y + 4y + 18xy - 18 ) / 36 =
(63x - 2y + 18xy - 18)/36