Answer:
7
Step-by-step explanation:
[tex]x^{2}[/tex] + 18 = 67
You first need to subtract 18 from both sides:
[tex]x^{2}[/tex] + 18 = 67
- 18 -18
_________
[tex]x^{2}[/tex] = 49
To get rid of the square, you need to square root both sides:
[tex]x^{2}[/tex] = 49
[tex]\sqrt{x^2} = \sqrt{49}[/tex]
This leaves you with:
x = 7
