Solving with Logarithms

Solve for x:

4^x+2 = 64

• x = -16/9

• x = 1

• x = 8

• x = 7/6

5^x-6=18

• 6.1

• 9.2

• 7.8

• 8

5(6)^3x=20

• 2.3

• .26

• .04

• 4

7^x=36

• 1.8416

• 3.5835

• 1.5563

• 3.0903

4^6x-12=7

• 1.4

• 2.23

• 13.40

• 3

• x=0.32

• x=3.11

• x=2.18

• x=30

• x=0.16

• x=1.02

• x=8.33

• x=6.11

• x=3.92

• x=5.16

• x=0.26

• x=2.14

• x=1.69

• x=0.43

• x=2.35

• x=2.42

• Divide by 125

• Use expansion to "bring the exponents down"

• Set the exponents equal to each other

• Rewrite the bases as powers of 5