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Question

Which of the following is a linear equation in one variable?

A
xy+5
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B
x+2
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C
x+4=0
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D
x3+3=0
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Solution

The correct option is C x+4=0
An linear equation in one variable is an equation which has only one variable, and the highest power of that variable is "one". Here, only (x+4=0) is a linear equation in one variable.

(x3+3=0) is an equation whose highest power of the variable is three. Hence, it is not a linear equation.

(x+2) and (xy+5) are algebraic expressions. They are not equations.

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