Lesson 21 Expressions and equations

Worksheet 2 Solving equations

Use the same ideas to solve these:

  1. 3x + 5 =  2x + 9                                      2.  5d – 6  = 3d + 12

 

 

 

Why is it okay to change:

3 (2p + 1) = 5p + 8.        to             2p + 1 + 2p + 1 + 2p + 1 = 5p + 8?

How can thinking like this help to find the value of p?

 

 

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Thinking Mathematics Lessons Copyright © by Michael Shayer and Mundher Adhami. All Rights Reserved.

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