Question 1

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Les rectes fraction numerator x plus 1 over denominator 1 end fraction equals fraction numerator y minus 1 over denominator 1 end fraction equals fraction numerator z minus 1 over denominator negative 1 end fraction i fraction numerator x plus 3 over denominator 1 end fraction equals fraction numerator y minus 3 over denominator 1 end fraction equals fraction numerator z plus 2 over denominator negative 1 end fraction són paral·leles. De les equacions següents, quina correspon a la del pla que les conté?
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