2x+5=1 7=4x-3 2x-4=3-5x x-2=5x-4

2x=-4 --> x=-2

7+3=4x --> 4x=10 --> x=10/4--> x=5/2

2x-4=3-5x --> 2x + 5 x = 4+3 --> 7x = 7 --> x=1

x-2=5x-4 --> -2 + 4 = -x + 5x --> 2=4x --> x=2/4 --> x=1/2

Salut !

[tex]2x+5=1 \\ 2x = 1 - 5 \\ 2x = -4 \\ x = \frac{-4}{2} \\ \\ x=-2 \\ \\ 7=4x-3 \\ 7+3=4x \\ 10=4x \\ x = \frac{10}{4} \\ \\ x= \frac{5}{2} [/tex]

[tex]2x-4=3-5x \\ 2x+5x=3+4 \\ 7x=7 \\ x= \frac{7}{7} \\ \\ x=1 \\ \\ x-2=5x-4 \\ x-5x=-4+2 \\ -4x=-2 \\ x= \frac{-2}{-4} \\ \\ x= \frac{1}{2} [/tex]

J'espère t'avoir aidé(e) ! :)