Question

simplify 3a-2b-2ab-(a+b-ab)+an+b-a​

Answer 1

$\sf{3a-2b-2ab-\left(a+b-ab\right)+ab+b-a}$

$\sf{=3a-2b-2ab-a-b+ab+ab+b-a$

$\sf{=-2ab+ab+ab+3a-a-a-2b-b+b}$

$\sf{=-2ab+ab+ab+a-2b-b+b}$

$\sf{=a-2b-b+b}$

$\bf{=a-2b}$