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Linear Equation in 2 Variables

cost of 1 pen...

Question

cost of 1 pen is Rs.x and that of 1 pencil is Rs.y.cost of 2 pens and 3 pencils together is Rs.18.write a linear equation to represent this information.

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Solution

Given cost of a pen is Rs x and that of a pencil is Rs y
Now, cost of 2 pens and 3 pencils is Rs 18.
Hence, 2x+3y=18 , which is the linear equation in two variables.

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