Answer:
2 b + a
Step-by-step explanation:
Simplify the following:
2 (a + 2 b) - a - 2 b
2 (a + 2 b) = 2 a + 4 b:
2 a + 4 b - a - 2 b
Grouping like terms, 2 a + 4 b - a - 2 b = (4 b - 2 b) + (2 a - a):
(4 b - 2 b) + (2 a - a)
4 b - 2 b = 2 b:
2 b + (2 a - a)
2 a - a = a:
Answer: 2 b + a
