
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.