Math Word Problems Demystified - A Self Teaching Guide

x¼$4000 invested at 2%

xþ 1600 ¼ 4000 þ 1600 ¼$5600 invested at 3

1

2

%

5. Letx¼the amount of money invested at 3% and 4x¼the amount
   of money invested at 4^12 % and xþ 900 ¼the amount of money
   invested at 6%.

3 %xþ 4

1

2

%ð 4 xÞþ 6 %ðxþ 900 Þ¼ 297

0 : 03 xþ 0 : 18 xþ 0 : 06 xþ 54 ¼ 297

0 : 27 xþ 54 ¼ 297

0 : 27 xþ 54 
 54 ¼ 297 
 54

0 : 27 x¼ 243

0 : 271 x

0 : 27

¼

243

0 : 27

x¼$900 invested at 3%

4 x¼ 4 ð 900 Þ¼$3600 invested at 4

1

2

%

xþ 900 ¼ 900 þ 900 ¼$1800 invested at 6%

6. Letx¼the amount of money invested at 2^34 % and 5x¼the amount
   of money invested at 5^12 %.

2

3

4

%xþ 5

1

2

%ð 5 xÞ¼$ 181 : 50

0 : 0275 xþ 0 : 055 ð 5 xÞ¼ 181 : 50

0 : 0275 xþ 0 : 275 x¼ 181 : 50

0 : 3025 x¼ 181 : 50

0 : 30251 x

0 : 30251

¼

181 : 50

0 : 3025

LESSON 15 Solving Finance Problems 169