$\"\"$

\

The height of the trapezoid is 3 ft, bases are 2 ft and $\"\"$ and area is 12 $\"\"$ .

\

Area of a trapezoid is $\"\"$

\

$\"\"$ (Substitute 3 for $\"\"$ , 2 for $\"\"$ and 12 for A)

\

$\"\"$ (Divide: $\"\"$ )

\

$\"\"$ (Divide each side by 1.5)

\

$\"\"$ (Cancel common terms)

\

$\"\"$ (Divide: $\"\"$ ) $\"\"$

\

$\"\"$ (Subtract 2 from each side)

\

$\"\"$ (Apply additive inverse property: $\"\"$ )

\

$\"\"$ (Apply additive identity property: $\"\"$ )

\

$\"\"$ (Subtract: $\"\"$ ) $\"\"$

\

The base $\"\"$ of the trapezoid is 6 ft.