book Maths Puzzle Numerical Ability

solve the equation
logbase3(3x-2)=2

I have absolutely no Idea what to do..can someone Please help me.
Thanks

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book Other Question

can you please help me with this problem, thank you, confused 1st cycle college student,

-2=x-12 Word Problem
Two angles of a triangle measure 21 degrees and 86 degrees. What is the measure of the third angle?