ANSWER
EXPLANATION;
Apply Pythagora's rule to find the value of x
[tex]\begin{gathered} \text{ Pythagora's rule} \\ \text{ Hypotenuse}^2\text{ = opposite}^2\text{ + adjacent}^2 \end{gathered}[/tex][tex]\begin{gathered} \text{ Hypotenuse = }\sqrt{117} \\ \text{ Opposite = x} \\ \text{ Adjacent = \lparen x + 3\rparen} \end{gathered}[/tex][tex][/tex]