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Besancon25
@Besancon25
April 2019
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Dm pour demain aider moi svp : trouver la valeur de x pour que l'égalité soie vraie : 2+x = 8. X- 4=12 . 9-x= 6. 2x=20. 3x=18. 3x+2=20 . 5x+3=23. Svp c urgent merci d'avance
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slyz007
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X+2=8 ⇔ x=8-2=6
x-4=12 ⇔ x=12+4=16
9-x=6 ⇔ x=9-6=3
2x=20 ⇔x=20/2=10
3x=18 ⇔ x=18/3=6
3x+2=20 ⇔ 3x=20-2=18⇔x=18/3=6
5x+3=23⇔5x=23-3=20⇔x=20/5=4
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Besancon25
Merci
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Besancon25
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Verified answer
X+2=8 ⇔ x=8-2=6x-4=12 ⇔ x=12+4=16
9-x=6 ⇔ x=9-6=3
2x=20 ⇔x=20/2=10
3x=18 ⇔ x=18/3=6
3x+2=20 ⇔ 3x=20-2=18⇔x=18/3=6
5x+3=23⇔5x=23-3=20⇔x=20/5=4