Vivian L. answered • 02/18/14

Tutor

3
(1)
Microsoft Word/Excel/Outlook, essay composition, math; I LOVE TO TEACH

Hi Sandy;

a-b=-(a-b)

a-b=-a+b

Let's combine like terms...

Let's subtract a from both sides...

a-a-b=-a-a+b

-b=-2a+b

Let's subtract b from both sides...

-b-b=-2a+b-b

-2b=-2a

Let's divide both sides by -2...

(-2b)/-2=(-2a)/-2

b=a

**a and b are equal.**