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Sagot :

VINS

Réponse :

[tex]bonjour\\\\x/2 = 4.5\\x = 9 \\\\2 x - 1 = 8 - x \\2 x + x = 8 + 1 \\3 x = 9\\x = 3 \\\\2 x - 2 = 8 + 2 x \\2 x - 2 x = 8 + 2 \\0 x = 10 \\\\pas de solution \\\\- 3 x + 3 + x = 3 - 2 x \\- 3 x + x + 2 x = 3 - 3 \\0 x = 0 \\tout nombre est solution \\\\[/tex]

Explications étape par étape :

Bonjour,

x/2 = 4,5

x = 4,5 * 2

x= 9

2x-1 = 8-x

2x+x =  8+1

3x = 9

x= 9/3

x= 3

2(x-1)  = 8+2x

2x-2 = 8+2x

2x-2x = 8+2

???

-3( x-1) +x = 3-2x

-3x +3 +x = 3-2x

-2x +3 = 3-2x

-2x +2x = 3-3

0 = 0

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