A. Quantity A is greater.
B. Quantity B is greater.
C. The two quantities are equal.
D. The relationship cannot be determined from the information given.
Explanation
Set up the initial comparison:
Then simplify:
Step 1: Multiply both sides by 5 to get
Step 2: Subtract 3
y
from both sides to get
Step 3: Divide both sides by 2 to get
The comparison is now simplified as much as possible. In order to compare 1 and
y
, note
that you are given the information
(above Quantities A and B). It follows
from
that
or
so
that in the comparison
the
placeholder represents
less than
(<):
.
However, the problem asks for a comparison between Quantity A and Quantity B, not a
comparison between 1 and
y
. To go from the comparison between 1 and
y
to
a comparison
between Quantities A and B, start with the last comparison,
and carefully consider
each simplification step in reverse order to determine what each comparison implies about
the preceding comparison, all the way back to the comparison between Quantities A and B
if possible. Since step 3 was "
divide
both sides by 2,"
multiplying
both
sides of the
comparison
by 2 implies the preceding comparison
thus reversing step 3. Each
simplification step can be reversed as follows:
A. Reverse step 3:
multiply
both sides by 2.
B. Reverse step 2:
add
3
y
to both sides.
C. Reverse step 1:
divide
both sides by 5.
When each step is reversed, the relationship remains
less than
(<), so Quantity A is less than
Quantity B.
Dostları ilə paylaş: