book Maths Puzzle Numerical Ability

I have a math exam tomorrow and i can not figure out this problem!! can you help? (it is not from a text book. . . she made our review up)
Log(6)5= Log(6)(2x+1)- log(6)(3x+4)
* the parenthesis are the bases!

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book Other Question

I need help on this problem:

Three times the greatest of three consucutive intergers exceeds twice the least by 38. Find the intergers.
Solve the system by addition

5x + 9y = -12
x - 2y = 10