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Simplify combining like terms $3a-2b-ab-(a-b+ab)+3ab + b-a$.
Given: $3a-2b-ab-(a-b+ab)+3ab + b-a$.
To do: To simplify combining like terms.
Solution:
$3a-2b-ab-(a-b+ab)+3ab + b-a$
$=3a-2b-ab-a+b-ab+3ab + b-a$
$=3a-2a+3ab-2ab-2b+2b$
$=a+ab$
$=a( a+b)$ [On taking $a$ as common]
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