Ed Moura has $29,000 invested in stocks paying 5%. How much additional money should he invest in certificates of deposit paying 2% so that the average return on the two investments is 3%?

Answer 1

return=sum of two returns
.03(29000+Y)=.05(29,000)+.2(Y)

solve for Y.
check my thinking.

Answer 2

Ed Moura has
​$50000
invested in stocks paying
7​%.
How much additional money should he invest in certificates of deposit paying
2​%
so that the average return on the two investments is
3​%?