Answer :

14.
[tex]A = \frac{1}{2} \cdot 12 \cdot x[/tex]
[tex]\frac{1}{2} \cdot 12 \cdot x = 108[/tex]
[tex]6x = 108; x = 18[/tex]

15.
[tex]A = b \cdot h = 16x[/tex]
[tex]96 = 16x; x = 6[/tex]

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