SOLUTION: Lucy's penny bank is 3\10 full. After she adds 560 pennies, it is 4/5 full. How many pennies can Lucy's bank hold?

Question 1184437: Lucy's penny bank is 3\10 full. After she adds 560 pennies, it is 4/5 full. How many pennies can Lucy's bank hold?
Answer by ikleyn(52817) (Show Source): You can put this solution on YOUR website!
.
Lucy's penny bank is 3/10 full. After she adds 560 pennies, it is 4/5 full.
How many pennies can Lucy's bank hold?
~~~~~~~~~~~~~~~~~

Let x be the number of pennies making the bank full.


Then

     -  = 560


Multiply everything by 10

    8x - 3x = 5600

       5x   = 5600

        x   = 5600/5 = 1120.


ANSWER.  1120 pennies make the bank full.

Solved and thoroughly explained.

RELATED QUESTIONS
Ann's penny bank is 1/5 full. After she adds 280 pennies, it is 7/10 full. How many... (answered by Alan3354)

Mary's penny bank is 1/4 full. After she adds 360 pennies, it is 5/8 full. How many... (answered by Alan3354,MathLover1,jim_thompson5910)

Martina's penny bank is 2/5 full. After she adds 320 pennies, it is 2/3 full. How many... (answered by josgarithmetic)

Isabel's penny bank is 1/4 full. After she adds 400 pennies, it is 2/3 full. How many... (answered by josgarithmetic)

Heather's penny bank is 1/10 full. After she adds 480 pennies, it is 1/2 full. How many... (answered by ewatrrr,richwmiller)

Lucy's penny bank is 1/2 full. After she adds 80 pennies, it is 2/3 full. How many... (answered by ewatrrr,MathTherapy)

elsa's penny bank is 1/3 full after she removes 240 pennies,it is 1/9 full how many... (answered by josgarithmetic)

A piggy bank is 1/2 full of pennies. If 50 pennies are added, it is 2/3 full. How many... (answered by josmiceli)

Tom's gas tank is 1/2 full. After he buys 7 gallons of gas, it is 3/4 full. How many... (answered by josgarithmetic)