Bonjours je doit rendre sa demain mais je ne sais pas faire pouvez vous m'aider?.... Pergunta de ideia deAnthony63

May 2019 1 80 Report

Bonjours je doit rendre sa demain mais je ne sais pas faire pouvez vous m'aider?

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Bonjour,

a. 2x/3 - 1 = 3x/2 + 4
4/6x - 6/6 = 9/6x + 24/6
4x - 6 = 9x + 24
4x - 9x = 24 + 6
- 5x = 30
x = - 30/5
x = - 6

b. 5x - 2 - 1 - x = 3 (x - 3)
8 5 10
20x - 8 - 8 - 8x = 3x - 9
40 40 10
20x - 8 - 8 - 8x = 12x - 36
20x - 8x - 12x = - 36 + 8 + 8
0x = - 20 - Impossible

c. 2x = 2/3 (x + x/4)- 7
2x = 2/3x + 2/12x - 7
24/12x = 8/12x + 2/12x - 84/12
24x = 8x + 2x - 84
24x - 8x - 2x = - 84
14x = - 84
x = - 84/14
x = - 6

d. 2x/7 = 5 - 3x
2
4/14x = 35 - 21x
14
4x = 35 - 21x
4x + 21x = 35
25x = 35
x = 35/25
x = 1,4

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