Class 9 NCERT Chapter 4 (Linear Equation in Two Variables) Exercise 4.1
In 1st question we were supposed to write the Linear equation to represent the statement [The cost of notebook is twice the cost of pen ] ( Cost of notebook is ₹x and cost of pen is ₹y )
So the equation came out to be :- [x-2y]
But why - sign why not + ?
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