Question 707629
    Printing a newsletter costs $1.50 per copy plus $450 in printer's fees. The copies are sold for $3 each. He many copies of the newsletter must be sold to break even 
.
Let n = number of newsletter sold
then "to break even":
1.50n + 450 = 3n
subtracting 1.50n from both sides:
450 = 1.50n
450/1.50 = n
300 = n
.
answer: 300