LINAHACHADII
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(-2/5x+4/5)×(3/4x-1/2)=0
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MAUDMARINE

Bonjour

(-2/5x+4/5)×(3/4x-1/2)=0

- 2/5x + 4/5 = 0            ou        3/4x - 1/2 = 0

- 2/5x = - 4/5                             3/4x = 1/2

- 2x = - 4                                     3x = 2

x = 4/2 = 2                                   x = 2/3.

Bonjour,

(-2/5x+4/5)×(3/4x-1/2)=0

soit

(-2/5x+4/5) =0

soit

(3/4x-1/2)=0

(-2/5x+4/5) =0

-2x/5 = -4/5

-2x = (-4/5*5) = -20/5 =  -4

x = -4/-2 = 2

ou

(3/4x-1/2)=0

3x/4 = 1/2*4 = 4/2 = 2

3x= 2

x = 2/3