Question

If 2x-y=4 then 6x-3y=?
(a) 15
(b) 12
(c) 18
(d) 10

Answer 1

trying hit and trial...consider y =0 for a moment ..then X= 2 with that said 6x-3y is 12...or consider x = 0 still 6x-3y is 12... now consider y = 1 then x is 2.5 ..then 6x - 3y is still 12...So it is b) 12