Question

Lena's penny bank is 1/2 full. After she removes 200 pennies, it is 3/10 full. How many pennies can Lena's bank hold?

Answer 1

(1/2)*x - (3/10)*x = 200
(5/10)*x - (3/10)*x = 200
(2/10)*x = 200
(1/5)*x = 200
x = 200*(5/1)
x = 200*5
x = 1,000 pennies