Question

Suppose a+b=2a. Which one of these expressions equals b−a? Choose 1 answer: 1) 2B 2) 2A 3) A-B 4) -2B 5) -B SQUARED

Answer 1

Hello from MrBillDoesMath!

Answer:

NONE of the provided answers.

Discussion:

a + b = 2a => (given)

(a - 2a) + b = 2a - 2a = 0 (subtract 2a from both sides)

-a + b = 0 =>

b - a =0

which is NONE of the provided answers.

Regards,

MrB

P.S. I'll be on vacation from Friday, Dec 22 to Jan 2, 2019. Have a Great New Year!