book Maths Puzzle Numerical Ability

I need to solve this log problem:



1) log( 8, (n-3)) + log( 8 (n + 4)) =1


I believe that the "logs" cancel out because they both have the same base. Then I dont understandwhat to do from there

Read Solution (Total 0)

book Other Question

solve the inequality symbolically. Express the solution set in interval notation.

7y-2<-6y-7
I do not understand how to solve this equation n-15=5/2*n, I do not know which section to solve first can you please help me?