Question

If x+2y=14 and x-y=5, find x.

• A. 6
• B. 4
• C. 8
• D. 10

Answer 1

Answer:

C. 8

We have:

$x + 2y = 14$
$x - y = 5$

From the second equation:

$x = y + 5$

Substitute into the first equation:

$(y+5) + 2y = 14$
$3y + 5 = 14$
$3y = 9$
$y = 3$

Now,

$x = y + 5 = 3 + 5 = 8$

Therefore,

$\boxed{8}$