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Lolilol311
@Lolilol311
May 2019
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Bonjour est ce que vous pouvez m'aider à résoudre ces équations en détaillant s'il vous plaît
1) 12x + 2/5 = 4/7 + x/2
2) 14x+2/13 = 11+x/2
Merci
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marieange1
Coucou!
2) Mettons tous au dénominateur commun 13x2=26:
14x+2/13 = 11+x/2
[(14x)(26)]/26+4/26=[11x26]/26+13x/26
364x/26+4/26=286/26+13x/26
364x+4=286+13x
364x-13x=286-4
351x=282
==>x=282/351
=94/117
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2) Mettons tous au dénominateur commun 13x2=26:
14x+2/13 = 11+x/2
[(14x)(26)]/26+4/26=[11x26]/26+13x/26
364x/26+4/26=286/26+13x/26
364x+4=286+13x
364x-13x=286-4
351x=282
==>x=282/351
=94/117