Sagot :
Bonjour,
5x - 4 = 8 - 3x
5x + 3x = 8 + 4
8x = 12
8x / 8 = 12 / 8
x = 3 / 2
x = 1,5
Salut, j'ai essayer de décomposer les étapes :
5x-4 = 8 - 3x
5x-4+4 = 8+4 -3x
5x = 12-3x
5x = 12-3x
5x+3x = 12-3x+3x
8x = 12
8x * 1/8 = 12 * 1/8
x = 12/8
x = 3/2