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zinedine701
@zinedine701
January 2021
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Bonjour , j'aimerais de l'aide pour ces équations , merci ^^
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aur70
Bonjour
a/ -3x+1+2x=2+5x-x+7 ⇔ 1-x=4x+9 ⇔ 5x=-8 ⇔ x=-8/5
b/ 2x+5=x-3/4 ⇔ x=-3/4-20/4 ⇔ x=-23/4
c/ 2x+5=3(2x-3) ⇔ 2x+5=6x-9 ⇔ 4x=13 ⇔ x=13/4
d/ (2-4)x=7x+8 ⇔ -2x=7x+8 ⇔ 9x=-8 ⇔ x=-8/9
e/ 3x+4/3=2x+1/6 ⇔ x=1/6-4/3 ⇔ x=1/6-8/6 ⇔ x=-7/6
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Bonsoir j'ai besoin d'aide pour ce QCM.
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a/ -3x+1+2x=2+5x-x+7 ⇔ 1-x=4x+9 ⇔ 5x=-8 ⇔ x=-8/5
b/ 2x+5=x-3/4 ⇔ x=-3/4-20/4 ⇔ x=-23/4
c/ 2x+5=3(2x-3) ⇔ 2x+5=6x-9 ⇔ 4x=13 ⇔ x=13/4
d/ (2-4)x=7x+8 ⇔ -2x=7x+8 ⇔ 9x=-8 ⇔ x=-8/9
e/ 3x+4/3=2x+1/6 ⇔ x=1/6-4/3 ⇔ x=1/6-8/6 ⇔ x=-7/6