Question

If x + 4y = 18 and x - 4y = 2, then x =? A) 2 B) 4 C) 5 D)10

Answer 1

Answer:

The Final answer is  option D ) 10

$x=10$

Step-by-step explanation:

Given:

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

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

To Find:

x =?

Solution:

Adding Equation ( 1 ) and ( 2 ) we get

$x+4y+x-4y=18+2\\\\2x=20\\\\\therefore x =\frac{20}{10} \\\\\therefore x =10$

The Final answer is  option D ) 10