Question

If 2x+y = 6 and x−6=y, what is the value of x?

(A) 0 (B) 2 (C) 3 (D) 4 (E) 6

Answer 1

x = 4

Explanation:

2x + y = 6 ... (i)

x - 6 = y ... (ii)

y = 6 - 2x ... (i)

y = x - 6 ... (ii)

So,

6 - 2x = x - 6

x + 2x = 6 + 6

3x = 12

x = 12/3 = 4