Pg 519 (451) - Q8
If Art’s earnings is denoted by A, and Bill’s earnings is denoted
by B, you can write the following equations:
Yesterday: A = B – 10
Today: A = B + 7.5
Art’s combined earnings for the 2 days would be:
(B – 10) + (B + 7.5) = 2B – 2.5
Bill’s two-day total would be 2B. Thus, Art earned $2.50
less than Bill for the 2 days, or D.