Basic Log Problems
Solving Logarithmic Equations
Solving Logarithmic Equations
Solving Logarithmic Equations
Solving Logarithmic Equations
100

log216=?

4

100

log5(4x+11)=?

x=7/2

100

log3(x2-6x)=3

x=-3 and x=9

100

log(x)=2-log(x-21)

x=25

100

log6(2x-4)+log6(4)=log6(40)

x=7

200

log416=?

2

200

log2(x+5)-log2(2x-1)=5

x=37/63

200

log(x-2)-log(2x-3)=log2

x=4/3

200

log4(-x)+log4(6-x)=2

x=-2

200

log2(x+1)-log2(2-x)=3

x=5/3

300

log5625=?

4

300

log8x+log8(x+6)=log8(5x+12)

x=3

300

log4(x2-2x)=log4(5x-12)

x=3 and x=4

300

ln(x)+ln(x+3)=ln(20-5x)

x=2

300

log3x+log3(x+3)=log3(2x+6)

x=2 and -3

400

log1/636=?

-2

400

log6x+log6(x-9)=2

x=12

400

log(6x)-log(4-x)=log(3)

x=4/3

400

log3(25-x2)=2

x=-4 and 4

400

log2(x+1)-log2(x-4)=3

x=33/7

500

log9(1/531441)=?

-6

500

log4(3x-2)-log4(4x+1)=2

No solution

500

ln(6x-5)=3

x=4.180923

500

4+3log(2x)=16

x=5000

500

ln(x-1)=1+ln(3x+2)

x=-0.89961

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