Question 1

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Estudia la posició relativa dels tres plans
open curly brackets table row cell straight pi colon end cell cell begin straight style 2 times x plus 8 times y minus 7 end style equals 0 end cell row cell straight pi apostrophe colon end cell cell begin straight style negative 5 times x minus 20 times y plus 28 end style equals 0 end cell row cell straight pi apostrophe apostrophe colon end cell cell begin straight style x plus 4 times y minus 7 end style equals 0 end cell end table close
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