200以上 2x-y=2 solve graphically 159720
Put x = 4, then y = 2 Put x = 2, then y = 2 Plot the three points (2,2) , (1,0) and (4,2) on the graph paper Join all these points using a single line , and hence we get the line 2x 3y = 2 Graph of x 2y = 8 Put x = 2, then y = 3 Put x = 4, then y = 2 Put x = 0, then y = 4