Answer:
For 100 cards, the costs will be the same.
Explanation:
Define the variable first.
Let the number of cards be
x
For each printer, the calculation process is the same, just using different values.
At Pristine P. Cost of
x
cards is:
0.10
×
x
+
15
=
0.10
x
+
15
(10c per card plus set up charge of $15)
At Printing P : Cost of
x
cards is:
0.15
×
x
+
10
=
0.15
x
+
10
(15c per card plus set up charge of $10)
For
x
cards, the two costs will be the same:
0.15
x
+
10
=
0.10
x
+
15
0.15
x
−
0.10
x
=
15
−
10
0.05
x
=
5
x
=
5
0.05
x
=
100
