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Exponential and logarithmic equations

Logarithmic equations

To solve logarithmic equations it will be useful for you to remember these basic properties of logarithms:

To solve a basic logarithmic equation, only rewrite the equation in exponential form and solve for the variable.

Solve: log2512 = -3x+9

512 = 2-3x+9 <=> 29= 2-3x+9 <=> 9=-3x+9 <=> 3x = 0 <=> x = 0

Solve: log4(5x+6) = 4

5x+6=44 <=> 5x+6=256 <=> 5x=250 <=> x=50

 log5 1 = -x+5 Solution: x=