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## JSS3: MATHEMATICS - 3RD TERM

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Lesson 2, Topic 1
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# Elimination Method

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#### Topic Content:

• Elimination Method

This method is very useful to solve simultaneous equations especially when none of the coefficients of the unknown is 1. To eliminate means to get rid of a variable.

### Example 2.1.1:

6x + 5y = 15
3x + 5y = 12

Solution

Since the coefficients of y in both equations are the same, the y-variable can be eliminated by subtracting equation (2) from (1)

This can be simply calculated as;

$$\scriptsize (6x \: – \: 3x) + (5y \: – \: 5y) = 15 \: -\: 12$$

$$\scriptsize 3x + 0 = 3$$

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