Question

Keisha's penny bank is 2/3 full. After she removes 120 pennies, it is 1/2 full.How many pennies does Keisha's bank hold?

Answer 1

`let \: \\ x = the \: number \: of \: pennies \: the \\ \: bank \: holds\\ 120 + (1)/(2)x = (2)/(3)x \\ 120 = (2)/(3)x - (1)/(2)x \\ 120 = (4)/(6)x - (3)/(6)x \\ (1)/(6)x = 120 \: so \\ \: x = 120 * 6 = 720`