Answer
$11.5x + 14y \leq 237$
$x+y\geq 16$
Work Step by Step
$20*12 = 240$
x = number 8.5 pictures, y = number 11 pictures
$8.5x+11y +3(x+y-1) \leq240$
$x+y\geq 16$
$8.5x+11y +3(x+y-1) \leq240$
$8.5x+11y +3x+3y-3 \leq240$
$11.5x + 14y \leq 237$
The overlap of the inequalities is the solution set for the inequalities.