Draw the graph of the equation 2y - x = 7 and determine from the graph if x = 3 , y = 2 is its solution or not .
In the question, the values of x and y must satisfy the equation ,so keeping these values in the equation 2y - x = 7
neglect R.H.S and put those values in 2y - x
=> 2(2) - 3
=> 4 - 3
=> 1 where 1≠ 7
=> so values of x and y aren't a solution of this equation