0 : 005 x¼ 15
0 : 0051 x
0 : 0051
¼
15
0 : 005
x¼$3000 invested at 4
1
2
%
9000 x¼ 9000 3000 ¼$6000 invested at 5%
- Letx¼the amount of money invested at 6% and 2x¼the amount of
money invested at 3%.
6 %xþ 3 %ð 2 xÞ¼$ 780
0 : 06 xþ 0 : 03 ð 2 xÞ¼ 780
0 : 06 xþ 0 : 06 x¼ 780
0 : 12 x¼ 780
0 : 121 x
0 : 121
¼
780
0 : 12
x¼$6500 invested at 6%
2 x¼ 2 ð 6500 Þ¼$13,000 invested at 3%
- Letx¼the amount of money invested at 2% andxþ1600 the amount
of money invested at 3^12 %.
2 %xþ 3
1
2
%ðxþ 1600 Þ¼ 276
0 : 02 xþ 0 : 035 ðxþ 1600 Þ¼ 276
0 : 02 xþ 0 : 035 xþ 56 ¼ 276
0 : 055 xþ 56 56 ¼ 276 56
0 : 055 x¼ 220
0 : 0551 x
0 : 0551
¼
220
0 : 055
168 LESSON 15 Solving Finance Problems