Помогите решить: 5(х-3)-2(х-7)+7(2х+6)=7
5x - 15 - 2x + 14 + 14x + 42 = 7 5x - 2x + 14x = 7 - 42 + 15 - 14 3x + 14x = 7 - 41 17x = - 34 x = - 34/17 x = - 2