$\"\"$

The equation is $\"7$ .

$\"7$ (Subtract 7 from each side)

$\"square$

Squaring on each side and eliminate square roots.

$\"open$

$\"4$

$\"\"$

$\"4$ (Subtract 8 from each side)

$\"4$

$\"fraction$ (Divide each side by 4)

$\"begin$ (Cancel common terms) $\"\"$

CHECK:-

To check the solution, substitute $\"begin$ in $\"7$ .

$\"7$

$\"9$

The solution is true. $\"\"$

The value of $\"begin$ .