Last week Michael sold twice as many red high tops as cross trainers. Red high tops sell for $20/pair and a cross trainer sells for $40/pair. He grossed $2000 in sales for the week. Construct a linear system describing the number of cross trainers in terms of the number of red high tops sold last week.
A) define your input and output variables
B)algebraically construct a 2 by 2 linear system involving your input and output variables.