You bought a magazine for $5 and four eralers. You spent a total of $25. How much did
each eraser cost? (Define 'n' and write the equation.)
n=cost of 1 eraser; 5-4n = 25
n=cost of 1 eraser; 5 + 4n = 25
n=total cost of erasers; 5 + 4n = 25
n=cost of 1 eraser; 5n + 4 = 25