Answer:
x= 6
Step-by-step explanation:
[tex]\frac{1}{3}x^{2}-5=7\\[/tex]
Add 5 to both sides
[tex]\frac{1}{3}x^{2}-5+5=7+5\\\\\frac{1}{3}x^{2}=12\\[/tex]
Multiply both sides by 3
[tex]3*\frac{1}{3}x^{2}=12*3\\\\x^{2}=36\\[/tex]
x² = 6*6
Take square root,
√x² =√6*6
x = 6
