Question

If x + 4y = 18 and x - 4y = 2, then x =?

A) 2

B) 4

C) 5

D)10

Answer 1

The Final answer is option D ) 10

`x=10`

Explanation:

Given:

`x + 4y = 18` ......................Equation( 1 )

`x - 4y = 2` ......................Equation( 2 )

To Find:

x =?

Solution:

Adding Equation ( 1 ) and ( 2 ) we get

`x+4y+x-4y=18+2\\\\2x=20\\\\\therefore x =(20)/(10) \\\\\therefore x =10`

The Final answer is option D ) 10