Which letter in the word happy has an order 2 rotational symmetry

Answer

Letter H

Explanation
The order of symmetry is the number times an object appears exactly the same when rotated about a certain axis.
From the word  HAPPY, only letter H will have 2 order of symmetry. 
When rotated at 180°, It will look exactly the same. 
A, P, P and Y have only 1 order of symmetry. 

Idon’t know what the answer is i wish i could

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0

the value of x is equal to 0.