HELP ME PLZZZ!!!

Question

The following lines all intersect at the same point. Determine the value a. 2x – 3y = 7 3x + 4y = 2 6x – ay = 26

Answer 1

3y= 7, y= 7/3

3x+4y = 2, 3x+4(7/3) = 2, 3x = 2-28/3, x= -22/9

6x +ay = 28, 6(-22/9) + ay = 28, 2(-22/3) +ay = 28

ay = 28 + 44/3 = (84+44)/3 = 128/3

a =128/3y= 128/(3)(7/3) = 128/7

a= 128/7 = 18 2/7

a = 18 2/7 = about 18.286 or 18.3