B. Write YES if the given point (x,y) is a solution to the linear equation in two variables, otherwise write NO. 6. x + y = 5 ; (2,3) 7. 2x - y = 9 ; (3,-3) 8. 5x + 3y = 8; (-4,4) 9. 4x - 3y = 3; (6,9) 10.8y-7x = -16 ; (-8,-9)​