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Draw the figure representing the position of the plans and if the 3 plans intersect, give the equation of the intersection. : 2x + x^

Draw the figure representing the position of the plans and if the 3 plans intersect, give the equation of the intersection.

$( pi_{1}: 2 x_{1}+x_{2}-x_{3}=4 ) ( pi_{2}: x_{1}-x_{2}+x_{3}=5 ) ( pi_{3}: 3 x_{1}+3 x_{2}-3 x_{3}=4 )$

: 2x + x^ - x3 = 4; x - x + x3 = 5; : 3x + 3x - 3x3 = 4

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