Year 8 Interactive Maths - Second Edition

Problem Solving 1

Example 7

A number is added to 85 and the result is 172.  Find the number.

Solution:

Let the number be x.

So, the number is 87.

Check:

Remember:

To solve a word problem:

• Read the problem.
• Assume that the unknown is x or another suitable pronumeral.
• Write an equation using the information provided in the problem.
• Solve the equation by using inverse operations.
• Write your answer in words.

Study Another Topic in Chapter 5: Equations

[ Equations ] [ Equations and a Pair of Scales ] [ Problem Solving 1 ] [ Equations Involving Two or More Operations ] [ Equations with the Pronumeral on Both Sides ] [ Equations Containing Brackets ] [ Problem Solving 4 ] [ Equations Containing Fractions ] [ Problem Solving 5 ] [ Problem Solving Unit ] [ Projects ] [ Symbols ] [ Index ]