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Sagot :

a) x ≠ -1

2(3x-2)=x+1

6x-4=x+1

5x=5

x=1

b)x≠ -1/2 et x≠1

(x+6)(2x-2)=(2x+1)(x-3)

2x²+10x-12=2x²-5x-3

2x²-2x²+10x+5x=12-3

15x=9x=9/15=3/5

c) x≠ -2

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

3(5-x)=-2(x+2)

15-3x= -2x-4

-3x+2x= -15-4

-x= -19

x=19

d)x≠ -5 et x≠ -3/2

[tex]\frac{x}{x+5}=\frac{2x}{2x+3}[/tex]

x(2x+3)=2x(x+5)

2x²+3x=2x²+10x

2x²-2x²+3x-10x=0

-7x=0

x=0

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