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Chapter 4 Lesson 3 Solving System of Equations Using Elimination

Chapter 4 Lesson 3 Solving System of Equations Using Elimination-example-1
User Jansohn
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1) 2x + 5y = 17

+ 6x – 5y = -9

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8x = 8

divide both sides by 8 :

Answer : x = 1 (one solution)


2) (3x – y = 0) * 4

(4x + 2y = 14) * 3

12x – 4y = 0

- 12x + 6y = 14

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-10y = -14

Divide both sides by -10

Answer : y = 1.4 (one solution)


3) 6x + 5y = 39

- 3x + 5y = 27

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3x = 12

Divide both sides by 3

Answer : x = 4 ( one solution )


4) 4x – 7y = 3

+ x – 7y = -15

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5x = -12

Divide both sides by 5

Answer : x= -2.4 (one solution)

User Aung Thet
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