Répondre :

loulakar

Bonsoir,

Equation :

3x-1=7x+5

3x - 1 - 3x = 7x + 5 - 3x

-1 - 5 = 4x + 5 - 5

-6 = 4x

4x/4 = -6/4

• x = -3/2


x-5=4x+13

x - 5 - x = 4x + 13 - x

-5 - 13 = 3x + 13 - 13

-18 = 3x

3x/3 = -18/3

• x = -6


5x+3=-2x+4

5x + 3 + 2x = -2x + 4 + 2x

7x + 3 - 3 = 4 - 3

7x = 1

7x/7 = 1/7

• x = 1/7

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