You want to have $$81,846$ in $12$ years. You plan to invest $$22,000$ in $4$ years in investment $A,$ which has an expected return of $15\mathrm{.}49$

percent per year. You also plan to invest $$x$ in $7$ years in investment B$,$ which has an expected return of $4\mathrm{.}20$ percent per year. What is

$x?$

$