Question

3x + 2y = 8
4x + y = 9
Solve the simultanrous equation

Answer 1

3x + 2y = 8 ............ 1

4x + y = 9 ............ 2

multiply equation 2 by 2

8x + 2y = 18 ............ 3

subtract equation 1 and 3

3x + 2y = 8

8x +2y = 18

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___________

-5x = -10

5x = 10

x =2

put x =2 in equation 1

3x + 2y = 8

6 + 2y =8

therefore y = 1

solution x = 2 and y = 1