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3x + 4y le 12...

`3x + 4y le 12`

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Consider the equation `,3x + 4y = 12`
The vlaues of (x,y) satisfying 3x +4y = 12 are :

Plot the points A (4,0) and B(0,3) on a graph paper. Then line AB represents `3x + 4y =12`
This line divides the plane of the paper in two equal parts . Clearly the points (0,0) satisfies `3x+4y le 12 `
So, we shade that part the plane together with all the points on line AB represents `3x + 4y le 12 `
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