Question

Last year, Hong had $30,000 to invest. He invested some of it in an account that paid 7% simple interest per year, and he invested the rest in an account that paid 8% simple interest per year. After one year, he received a total of $2210 in interest. How much did he invest in each account?

Answer 1

Let x = the amount hong invested in an account that paid 7% interest

Let y = the amount hong invested in an account that paid 8% interest

as hong get $2210 as intrest

multiply both side by 100

as we know that

the amount hong invested in an account that paid 7% interest is $19000

the amount hong invested in an account that paid 8% interest is $11000