Ответ:а) 8x − 13 = 43; 8x = 56; x = 7.б) 35 − (4x − 1) = 12; 36 − 4x = 12; −4x = −24; x = 6.в) 2(x + 7) = x + 19; 2x + 14 = x + 19; x = 5.Ответ: а) x = 7; б) x = 6; в) x = 5.