is 3x - 4y + 12 = 0 a linear equation in two variables ?!
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Similarly the line 3x – 4y + 12 = 0 intersects at Y axis in point B. Since, the line cuts at y axis so at that point x = 0. So, we will substitute this value in the equation of line 3x – 4y + 12 = 0. Thus, we get 3(0) – 4y + 12 = 0 or – 4y + 12 = 0.
sooo...
From the question, we can see that 3x-4y =12 is an equation of two variables x and y.
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