Here's the question you clicked on:
kryton1212
The x-coordinate of the point of intersection of the straight lines 2x+ay-7=0 and ax-y-5=0 is 2. If a is an integer, find the value of a.
2x+ay-7=0 -(1) ax-y-5=0 -(2) From the second equation: y = ax-5 -(3) Sub. (3) into (1) 2x+a(ax-5)-7=0 -(4) Sub x=2 into (4), then solve a I think it should work.
thank you I got it:)