The music store sold 12 trumpets and 19 clarinets last month. Write an equation to show the amount of money earned on trumpet and clarinet sales last month's. Define your variables.

12t + 19c

where t = selling price of trumpets and

c = selling price of clarinet

Explanation:

Let t be the selling price per unit for trumpets and c be the selling price per unit for clarinet.

Given that the music store sold 12 trumpets and 19 clarinets

Therefore,

Money earned from sale of trumpets = 12t

Money earned from sale of clarinets = 19c

Total amount earned last month = 12t + 19c

12c+19t=e

C = cost per clarinet

T = cost per trumpet

E = total money earned