Math Word Problems Demystified - A Self Teaching Guide

 70 x¼
 490

 701 x


 701

¼

490

70

x¼7 reams of college-ruled paper

9 
x¼ 9 
 7 ¼2 reams of wide-ruled paper

10. Letx¼the number of $5 bills, 2x¼the number of $1 bills, and
    x
    1 ¼the number of $10 bills; then the value of the $5 bills is 5x,
    the value of the $1 bills is 1 2 x, and the value of the $10 bills is
    10(x
    1).

5 xþ 2 xþ 10 ðx
 1 Þ¼ 75

5 xþ 2 xþ 10 x
 10 ¼ 75

17 x
 10 ¼ 75

17 x
 10 þ 10 ¼ 75 þ 10

17 x¼ 85

171 x

171

¼

85

17

x¼5 five-dollar bills

2 x¼ 2  5 ¼10 one-dollar bills

x
 1 ¼ 5 
 1 ¼4 ten-dollar bills

LESSON 11 Solving Coin Problems 117