Hello I'm a newbie. I need help with my homework. I have ADD bad. I don't understand this section Could someone please show how to work these problems?

In Ex 73-92, solve the logarithmic equation algebraically. Round the result to three decimal places. Verify your answer using a graphing utility.

81. 7 log4(0.6x)=12

83. ln sq. root(x+2)=1

89. ln(x+5)=ln(x-1)-ln(x+1)