Mr. RIDDLE invested in Fund X and Fund Y. The total amount she invested, in both funds combined, was $200,000. In one year, Fund X paid 43% and Fund Y paid 28%. The interest earned in Fund Y was exactly $200 greater than the interest earned in Fund X. How much did Ms. Tom invest in Fund X?
Select the correct option
A) 43,870.34 B) 56,876.45 C) 77,789.45 D) 78,450.70 E) 87,987.34
X+Y=200,000   0.28Y=0.43A+300   Take away decimals first: 28Y+43X+20,000   Isolate first equation to solve for X (your goal): Y=200,000-Y   Plug in for B:   28(200,000-X)=43X+30,000   5,600,000-28X=43X+30,000   5,570,000=71X   5,570,000/71=X   5,570,000/71=X   X=78,450.70=Answer Choice 78,450.70
<result>D</result>
Mr. RIDDLE invested in Fund X and Fund Y. The total amount she invested, in both funds combined, was $200,000. In one year, Fund X paid 43% and Fund Y paid 28%. The interest earned in Fund Y was exactly $200 greater than the interest earned in Fund X. How much did Ms. Tom invest in Fund X?