42 more than half a number is the same as four times the number. what is the number? explain

1/2x + 42 = 4x
-1/2x           -1/2x

42 = 3.5x
/3.5   /3.5

12 = x
the number is 12

explanation: 42 more than 1/2 of a number can be written as 1/2x + 42
four times a number can be written as 4x.
42 more than 1/2 of a number is equal to 4 times a number. So 1/2x + 42 = 4x.

Hope this helps :)

40%=2/550=1/230=3/1056=14/25