Question

the cost of printing 200 business cards is $23. The cost of printing 500 business cards at the same business is $35. Write and solve a linear equation to find the cost for printing 700 business cards.

Answer 1

 It should be $80.50. 
Divide 23 by 200,
Times that number by 700, 
Wella! there's your answer.
~Glad to help.