Question 426892

x-coordinate = 2 *  y-coordinate 

put x =2y on equation,

2*2y - 6y = 7

=> 4y - 6y = 7

=> -2y = 7

=> y = -7/2


then x = 2 * (-7/2) = -7

so, required value : ( -7, -7/2 )