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Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 9

Solve by the method of elimination 2x – y = 3, 3x + y = 7 - Mathematics

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Question

Solve by the method of elimination

2x – y = 3, 3x + y = 7

Sum

Solution

2x – y = 3 → (1)

3x + y = 7 → (2)

By adding (1) and (2)

5x + 0 = 10

x = `10/5`

x = 2

Substitute the value of x = 2 in (1)

2(2) – y = 3

4 – y = 3

– y = 3 – 4

– y = –1

y = 1

The value of x = 2 and y = 1

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Methods of Solving Simultaneous Linear Equations by Elimination Method
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Chapter 3: Algebra - Exercise 3.12 [Page 128]

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Samacheer Kalvi Mathematics [English] Class 9 TN Board
Chapter 3 Algebra
Exercise 3.12 | Q 1. (i) | Page 128
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