exam Maths Puzzle Numerical Ability

Please help.
log base3(x-2)+log base3(x+4)=3
e^x+5=8

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exam Other Question

The Computer Club invested $2200, part at 4.5% interest and the rest at 7%. The total annual interest earned was $144. How much was invested at each rate?
How do I set up this problem?
Solve

log 4x = 1095 + log (x-3)