3y - 5 + y = 1124y - 5 = 1124y = 117y = 117/4 = 29.25
7a + 1 - 6a - 3 = 53a - 2 = 53a = 53 + 2 = 55
8s + 11 - 13 = 9s - 548s - 2 = 9s - 54-2 + 54 = 9s - 8s52 = s
5x - 4 + 7x - 4 = 8 - 15 + 11x12x - 8 = 4 + 11xx = 12
2x + 5 = 2(x + 1) + 112x + 5 = 2x + 2 + 115 = 13
Как видим, последнее уравнение не имеет решения.
3y - 5 + y = 112
4y - 5 = 112
4y = 117
y = 117/4 = 29.25
7a + 1 - 6a - 3 = 53
a - 2 = 53
a = 53 + 2 = 55
8s + 11 - 13 = 9s - 54
8s - 2 = 9s - 54
-2 + 54 = 9s - 8s
52 = s
5x - 4 + 7x - 4 = 8 - 15 + 11x
12x - 8 = 4 + 11x
x = 12
2x + 5 = 2(x + 1) + 11
2x + 5 = 2x + 2 + 11
5 = 13
Как видим, последнее уравнение не имеет решения.