is a triangle with sides , and . is point inside the triangle. Perpendiculars from are drawn to the sides , , and . These perpendiculars are named , and , respectively. Find the value of .
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A r e a △ A B C 1 2 0 = A r e a △ P A B + A r e a △ P B C + A r e a △ P A C = 2 4 y × 2 1 + 1 0 x × 2 1 + 2 6 z × 2 1
Hence, 5x+12y+13z=120