EQUATIONS/ Bonjour, pourriez-vous m'aider pour cet exercice en Maths svp? Merci d'avance.... Pergunta de ideia deLucymaths

May 2019 1 135 Report

EQUATIONS/ Bonjour, pourriez-vous m'aider pour cet exercice en Maths svp? Merci d'avance.

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Bonjour =)

7 - 8x = 56
-8x = 56 - 7
-8x = 49
x = 49/-8
x = -49/8

6x - 4 = 3x + 14
6x - 3x = 14 + 4
3x = 18
x =18/3
x = 6

5(x-3) - 3x +7 = 9
5x - 15 - 3x +7 = 9
2x = 9 - 7+15
2x = 17
x = 17/2

$\dfrac{7x}{3} + 5=7- \dfrac{5x}{3} \\ \\ 7x + 15 = 21 -5x \\ \\ 7x +5x = 21-15 \\ \\ 12x=6 \\ \\ x= \dfrac{6}{12} \\ \\ x=0,5$

2 votes Thanks 1

Lucymaths Mercii

LaPerlEDeMath de rien =)

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