résoudre l'équation 1+3x=7(5-2x)

1 + 3x = 7(5 - 2x)
1 + 3x = 35 - 14x
3x + 14x = 35 - 1
17x = 34
x = 34/17
x = 2

S= {2}

bonjour

1 + 3 x = 7 ( 5 - 2 x)
1 + 3 x = 35 - 14 x
3 x + 14 x = 35 - 1
17 x = 34
x = 34/17
x = 2