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Sagot :

MARGESIMPSON1

Bonsoir,

Résoudre les équations :

A) 3+4x = 5x-9

A) 3+4x-5x = -9

A) 4x-5x = -9-3

A) -x = -9-3

A) -x = -12

A) x = 12

B) 3/7x-18/14x = 6-x

B) 3/7x-9/7x = 6-x

B) 3x-9x = 42-7x

B) -6x = 42-7x

B) -6x+7x = 42

B) x = 42

Bonne soirée.

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