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Sagot :

AYUDA

bsr

4 - 4 - 5x = 9x - 4

-5x = 9x - 4

-5x - 9x = 9x - 9x - 4

-14x = -4

x = 4/14

x = 2/7

et

7x + 13 - 13 = - 2 - 13

7x = -15

x = -15/7

VINS

[tex]bonjour\\\\\\4 - 5 x = 9 x \\- 5 x - 9 x = - 4\\- 14 x = - 4 \\x = 4/14 \\x = 2/7 \\\\\\7 x + 13 = - 2 \\7 x = - 2 - 13 \\7 x = - 15 \\x = - 15/7 \\\\[/tex]

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