What is the maximum value of y if a point (x,y) is a possible solution of the system of inequalities below?
y<=-4x+16 and y<=3x+9
A)10
B)13
C)12
D)19
-4x + 16 = 3x + 9
7x = 7
x = 1
-4(1) + 16 = 12
C
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