Question

Draw the graph of x+y=7 & 2x-y=5

Answer 1

Answer:

$(x + y = 7) + (2x - y = 5) \\ x + y - 2x + y = 5 - 7 \\ x + y - 2x + y = - 2 \\ - x + 2y = - 2 \\ x + 2y= 2 \\ x = - 2y + 2 .\\ x + 2y = 2 \\ 2y = x - 2 \\ y = \frac{x - 2}{2} .$

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