6x + 5 = a – 2 ⇔ 3x – 7 = 4а – 1
6x = a – 2 – 5 ⇔ 3x = 4a – 1 + 7
6x = a – 7 ⇔ 3x = 4a + 6
x = (a – 7) / 6 ⇔ x = (4a + 6) / 3
(a – 7) / 6 = (4a + 6) / 3
a – 7 = 8a + 12
7a = –7 – 12
a = –19/7
6x + 5 = a – 2 ⇔ 3x – 7 = 4а – 1
6x = a – 2 – 5 ⇔ 3x = 4a – 1 + 7
6x = a – 7 ⇔ 3x = 4a + 6
x = (a – 7) / 6 ⇔ x = (4a + 6) / 3
(a – 7) / 6 = (4a + 6) / 3
a – 7 = 8a + 12
7a = –7 – 12
a = –19/7