Fundamentals of Mathematics, 2008a

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Step 5. The three odd integers are -7, -5, -3.
11.7.3.2 Practice Set A
Exercise 11.7.1 (Solution on p. 688.)
When three times a number is decreased by 5, the result is -23. Find the number.
Step 1: Let x =
Step 2:
Step 3:
Step 4: Check:
Step 5: The number is .
Exercise 11.7.2 (Solution on p. 688.)
When ve times a number is increased by 7, the result is ve less than seven times the number.
Find the number.
Step 1: Let n =
Step 2:
Step 3:
Step 4: Check:
Step 5: The number is .
Exercise 11.7.3 (Solution on p. 688.)
Two consecutive numbers add to 35. Find the numbers.
Step 1:
Step 2:
Step 3:
Step 4: Check:
Step 5: The numbers are and .
Exercise 11.7.4 (Solution on p. 688.)
The sum of three consecutive even integers is six more than four times the middle integer. Find
the integers.
Step 1: Let x = smallest integer.
= next integer.
= largest integer.
Step 2:
Step 3:
Step 4: Check:
Step 5: The integers are , , and .
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