Answer: 1200 pennies
Explanation:
Let x be the number of pennies Yoko's bank can hold.
We can set up an equation representing the information given.
![(2x)/(5) + 320 = (2x)/(3)](https://img.qammunity.org/2023/formulas/mathematics/high-school/t3m5jhcdnysdlwc1epj4sd3td4wai1pint.png)
We can multiply both sides by 15:
6x + 4800 = 10x
Combine like terms:
4x = 4800
Divide both sides by 4:
x = 1200