She is to invest $150,000 in the low risk found at 9%
 She is to invest $50,000 in the high risk found at 13%
  Let x = money invested at 9%
 Let y = money invested at 13%
  x+y = 200000
 .09x + .13 y = 20000
  since
 x = 200000-y
 then
 .09(200000-y) +.13y = 20000
 18000-.09y+.13y = 20000
 .04 y = 20000
 y = 50000
  then
x = 200,000-50000 =150000