Răspuns :
6/(x + 1) = 15/(2x + 6)
15(x + 1) = 6(2x + 6)
15x + 1 = 12x + 36
15x - 12x = 36 - 1
3x = 35
x = 7
q.e.d.
15(x + 1) = 6(2x + 6)
15x + 1 = 12x + 36
15x - 12x = 36 - 1
3x = 35
x = 7
q.e.d.