Math Word Problems Demystified - A Self Teaching Guide

 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%

3. 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%

4. 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