Question

X+y=9 & x-y = 1 elimination method

Answer 1

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$x + y = 9 \\ x - y = 1 \\ .\\ .\\ 2x = 10 \\ x = \frac{10}{2} \\ x = 5$

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Answer 2

X+y = 9

x -y = 1. adding both equations

_________

2x = 10

x =5

Putting value of x in any of the above equation

5+ y = 9

y= 9-5

y=4