Упрости выражения, где это возможно.
b + Sb + 6b
ба - 4а
100 + 3a + 2a
9p + 20р + 8р
12х - 10y
2 + 5х + 3 + 5x

ответ:
1. 14b
2. 4 a
3. 18a
4. 40p
5. 2
6. 17x​
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