Question

____
7a-[5a-{3a-(4b-2a-3b)}]​

Answer 1

Answer:

open

Step-by-step explanation:

i hope it helps to you

follow and please brainlist

Answer 2

Answer:

7a-b

Step-by-step explanation:

7a-[5a-{3a-(4b-2a-3b)}]

7a-[5a-{3a-(1b-2a)}]

7a-[5a-{3a-1b+2a)}] ( minus is present outside of the bracket so the signs will change)

7a-[5a-{5a-1b}]

7a-[5a-5a+1b] ( minus is present outside of the bracket so the signs will change)

7a-5a+5a-1b ( minus is present outside of the bracket so the signs will change)

7a-1b or 7a-b ( -5a and +5a gets cut )

Final answer : 7a - b