Question

Which of the following is a linear equation
x+y-2
2x+5=11
15

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Answer 1

x + y = 2

y = 2 - x

so it is a linear equation.

2x + 5 = 11

2x = 11 - 5

2x = 6

x = 3

it is not a function because for just one x we have many y