If A = xy + 11y; B = 2x + 3y ; C = 3x - 4y find A + B +C.
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A = xy + 11y
B = 2x + 3y
C = 3x - 4y
A + B + C = xy + 11y + 2x + 3y + 3x - 4y
= xy + 5x + 10y
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