It is not possible to answer the question because the browser which you were required to use for posting the question strips out most mathematical symbols. It is therefore often impossible to be clear what the question was meant to be.
All that is visible here is 3 or 4 disjointed expressions: no equation in sight so there is nothing which can be solved.
7a minus 2, if "3a-2" means 3a minus 2. 3a plus 1 and 1-3rd in parenthesis times 3a, if "3a-2" means 3a squared. a plus 3a squared plus 3a = 1-3rd times 3a plus 3a times 3a plus 1 times 3a = 3a plus 1 and 1-3rd in parenthesis times 3a
a-1<2a-6<9+3a
It can be simplified to: 3a^2 +10a+7 or factored as (3a+7)(a+1)
1 less than -3a
3a(2a + 1)
1
-21 = 9a - 15 - 3a -6 = 6a -1 = a
(2a+1)(a+1)
1
If 3a+5=5a+3, then: 3a+5 - 3a = 5a+3 - 3a 5=2a+3 5 - 3=2a+3 - 3 2=2a a=1
It is: 7a+1 when simplified
Answer to: 5a + 1 = a - 3a = -1