Problema Solution
a) The price of a product went up $3 in 2013 and went down $4 in 2014. What is the overall change in price over the two year period?
Answer provided by our tutors
Let 'x' represent the start price of the product.
In 2013 the product's price went up $3: x + 3
In 2014 the product's price went down $4: x + 3 - 4 = x - 1
The overall change in price in 2 year period was $1 that is the price went down $1 at the end of the second year.