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

2x + 3y = 10

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4a + 5b = 3b + 6

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2x = 3x + 4

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2x + 4z = 5

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Solution

The correct option is C
2x = 3x + 4

If the degree of an equation is one, then that equation is a linear equation.

According to that, all the equations given are linear, but '2x = 3x + 4' is a linear equation in one variable as it has only one variable, x.

The other equations are linear but have two variables.

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2 x - 1 = \frac{3}{2}

x + 3 y = 5

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The system of equations

X+2y+3z=4

2x+3y+4z=5

x + 3 y = 6 2 x - 3 y = 12

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