Question

x+y=4
x-y=8
linear equations in two variables​

Answer 1

2x=12x=12

y=-8

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Answer 2

Add both the equations...

x+y+x-y=4+8

2x = 12

x = 6

So put x = 6... in x+y = 4

=> 6+y = 4

=> y = 4-6

=> y = -2

So x = 6 and y = -2

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