Which of the following is a linear equation i | vedclass

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(D) linear equation in two variables is an equation of the form $ax + by + c = 0$,where $a, b,$ and $c$ are real numbers and $a$ and $b$ are not both

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$x = y$

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(D) linear equation in two variables is an equation of the form $ax + by + c = 0$,where $a, b,$ and $c$ are real numbers and $a$ and $b$ are not both zero.$1$. In option $A$,the term $\frac{3}{x}$ makes it a non-linear equation.$2$. In option $B$,the term $\frac{1}{y}$ makes it a non-linear equation.$3$. In option $C$,the variables have a degree of $2$,making it a quadratic equation.$4$. In option $D$,$x = y$ can be written as $1x - 1y + 0 = 0$,which fits the standard form of a linear equation in two variables with degree $1$.

Which of the following is a linear equation in two variables?

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