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Integer Word Problems




In these lessons we will look at Integer Word Problems that has more than two unknowns.

In another set of lessons, we have some examples of Integer Word Problems that involve two unknowns.

Related Topics: More Algebra Word Problems

Integer Problems With More Than Two Unknowns

These problems are not necessarily more difficult than integer word problems with two unknowns. You just have to be careful when relating the different unknowns.

Example:

Jane and her friends were selling cookies. They sold 4 more boxes the second week than they did the first. On the third week, they doubled the sale of their second week. Altogether, they sold a total of 352 boxes. How many boxes did they sell in the third week?

Solution:

Step 1: Sentence: They sold 4 more boxes the second week than they did the first. On the third week, they doubled the sale of their second week.

Assign variables:

Let x =   boxes sold in the first week
  x + 4 =   boxes sold in the second week
  2(x + 4) =   boxes sold in the third week

Sentence: She sold a total of 350 boxes

x + x + 4 + 2(x + 4) = 352

Remove the brackets and combine like terms

x + x + 4 + 2x + 8 = 352
4x + 12 = 352

Isolate variable x

4x = 340
x=85

Step 2: The question asks for boxes sold in the third week.

Plug x = 85 into 2(x + 4) = 178

Answer: In the third week, they sold 178 boxes.



 

Example:

The sum of three numbers is 12. The first is five times the second and the sum of the first and third is 9. Find the numbers.


Advanced Consecutive Integer Problems
Find three consecutive positive integers such that the sum of the two smaller integers exceed the largest integr by 5.



 

The largest of five consecutive even integers is 2 less than twice the smallest. Which of the following is the largest integer?


The sum of three numbers is 12. The first is five times the second and the sum of the first and third is 9.



 

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