Year 8 Interactive Maths - Second Edition

Equations with the Pronumeral on Both Sides

Example 10

Solution:

Problem Solving 3

Example 11

If 7 less than three times a number is 9 more than the number, what is the number?

Solution:

Let x be the number.
Seven less than three times x is 3x – 7, and 9 more than x is x + 9.

So, the number is 8.

Check:

Study Another Topic in Chapter 5: Equations

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