Question 283797
you have $2.58 in pennys and nickels.Number of pennys 36 less than two times the number of nickels how many pennys do you have?

let the number of nickels be x

number of pennys = 2x-36

5x+(2x-36)=258 cents

5x+2x-36= 258

7x -36+36=258+36

7x=294
x= 294/7

x=42  which is the number of nickels

Number of pennies = 2x-36

plug the value of x 

we get 2*42-36
=48 
Number of pennies = 48