A Geometryset costs b dollars. A pen costs $2.00 less than the geometry set. Construct and simplify an expression in terms of b for the total cost of all three items.
a = Price of a pen
b = Price of a Geometryset
a = b - 2
Total price = a + b
= b - 2 + b
= 2 b - 2
= 2 ( b - 1 )
Total price = 2 ( b - 1 ) $