Question

Sarah received $55 for her birthday. She used some of that money to buy 3 shirts priced at m dollars each.
How much money does Sarah have left?
Write your answer as an expression.

Answer 1

There is not enough information so this equation is an unsolvable.
You could figure out the equation if the 3 were M and M had a number but this is unsolvable. SORRY

Answer 2

55-3m = 22

m=11

each shirt is $11