1. (5a + 6) = (4 – 3a) + 47
5a + 3a = 4 + 47 – 6
8a = 45
a = 45 / 8
2. 6x + 5 = a – 2 ⇔ 3x – 7 = 4a – 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
8a – a = –12 – 7
7a = –19
a = –19 / 7
1. (5a + 6) = (4 – 3a) + 47
5a + 3a = 4 + 47 – 6
8a = 45
a = 45 / 8
2. 6x + 5 = a – 2 ⇔ 3x – 7 = 4a – 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
8a – a = –12 – 7
7a = –19
a = –19 / 7