algebra word problem

Question

machine a, machine b and machine c are three different models of balloon stamping machines. in one week machine b stamps three times as many balloons as machine a. machine c stamps 150 more balloons than machine a. all three machines working together stamp 1400 balloons in one week. find the number of balloons stamped by each machine in one week.

Answer 1

a = number of balloons stamped by machine a

3a = number of balloons stamped by machine b

a+150 = number of balloons stamped by machine c

1400 = total

 

Can you write an equation using this information and then solve a, and determine how many balloons are stamped by each machine?