Math Word Problems Demystified - A Self Teaching Guide

9. Letx¼first odd integer andxþ 2 ¼second odd integer; then

xþxþ 2 ¼ 48

2 xþ 2 ¼ 48

2 xþ 2 
 2 ¼ 48 
 2

2 x¼ 46

21 x

21

¼

46

2

x¼ 23

xþ 2 ¼ 23 þ 2 ¼ 25

10. Letx¼one number and 30
    x¼the other number; then

x
ð 30 
xÞ¼ 6

x
 30 þx¼ 6

2 x
 30 ¼ 6

2 x
 30 þ 30 ¼ 30 þ 6

2 x¼ 36

21 x

21

¼

36

2

x¼ 18

30 
x¼ 30 
 18 ¼ 12

LESSON 9 Solving Number Problems 97