Question

2a-[(4a+b)-(5a+b)] simplify it

Answer 1

$2a-[(4a+b)-(5a+b)]$

$2a-[(4a+b-5a-b)]$

$2a-[-a]$

$2a+a$

$3a$

Answer 2

2a-[(4a+b-5a-b)]
2a-(4a-5a+b-b)
2a-(-a)
2a+a=3a
so the answer is 3a