Răspuns :
3/7 *(x/1 - 1/2) = 15/14
amplifici x/1 cu 2 => 2x/2
3/7*((2x-1)/2) = 15/14
6x - 3 / 14 = 15/14 => 6x - 3 = 15 => 6x = 18 => x = 3
amplifici x/1 cu 2 => 2x/2
3/7*((2x-1)/2) = 15/14
6x - 3 / 14 = 15/14 => 6x - 3 = 15 => 6x = 18 => x = 3