I am trying to write a word problem,...

The problem

I am trying to write a word problem, how can I make sure it's right?

Twice the difference of a number and seven is equal to three times the sum of the number and seven

Let 'x' represent the number that you need to find.

2(x - 7) = 3(x + 7)

........

........

x = -35

The number is -35.