The equation is

. We can rewrite the equation as:

.
Our next step here is to take the square root of both sides, remembering that

.
Thus, we have

. Our final step is solving the absolute value equation, which yields:

or

.
Solution set: {

}
The answer is: "123454321"
Hope this helps!
4 + 2x = 7
2x = 7 - 4 = 3
x = 3/2 = 1.5 inches