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Sagot :

a)

2x=-2

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

x=-1

b)

-3x=12

[tex]\frac{-3x}{-3} =-\frac{12}{3}[/tex]

x=-4

c)

[tex]3x=\frac{1}{2}\\\frac{3x}{3} =\frac{1}{2}*\frac{1}{3}\\x=\frac{1}{6}[/tex]

d)

[tex]\frac{1}{2}x=3\\\frac{1}{2}x*\frac{2}{1} =3*\frac{2}{1} \\x=6[/tex]

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