Question

x+y=1 2x-y=-7 graph answer​

Answer 1

Answer:

Step-by-step explanation:

Write a linear equation in two variables to represent this statement.

      (Take the cost of a notebook to be Rs. x and that of a pen to be Rs. y).

Sol: Let the cost of a notebook = Rs x

           The cost of a pen = y

           According to the condition, we have

                           [Cost of a notebook] = 2 × [Cost of a pen]

           i.e.            [x] = 2 × [Y]

           or              x = 2y

           or              x – 2y = 0.