Répondre :
bonjour
a) 2 ( x - 1 ) = 2 x - 2
c) x + 3 + x + 5 = 2 x + 8
e ) ( x + 3 )- ( x + 3 ) = x + 3 - x - 3 = 0
b ) x + x + x = 3 x
d ) 2 x * 3 x = 6 x²
f ) 2 x = x²
- x² + 2 x = 0
x ( - x + 2 ) = 0
x = 0 ou 2
bonjour
a) 2 ( x - 1 ) = 2 x - 2
c) x + 3 + x + 5 = 2 x + 8
e ) ( x + 3 )- ( x + 3 ) = x + 3 - x - 3 = 0
b ) x + x + x = 3 x
d ) 2 x * 3 x = 6 x²
f ) 2 x = x²
- x² + 2 x = 0
x ( - x + 2 ) = 0
x = 0 ou 2