Math question: Compare A to B?

Question

How do I go about solving this problem??

If a - b = a + b, compare: A. b B. 1

Answer 1

idk, seems b would have to be 0 . . .

so b < 1

Answer 2

Subtract a from both sides: -b = b , so b = 0

You're left with a = a  which is always true no matter what value a has.

Answer 3

This may seem like a very tricky question, but it is not.

If you look at both side of the equation, they both have a, if we minus a on both side, what is left?

-b = + b

that is only true when b is zero, and a could be anything, because 10 + 0 is the same as  10 -0, same goes for 20, or 30.

I hope that helps.