Posted by **lisa** on Sunday, March 10, 2013 at 8:52am.

solve each equation 1) log5-log2x=1 2) 2log(x+1)=5

- math -
**Reiny**, Sunday, March 10, 2013 at 9:45am
1)

log5 - log(2x) = 1

log(5/2x) = 1

5/(2x) = 10^1

20x = 5

x = 1/4

2)

2log(x+1) = 5

log(x+1) = 5/2

10^(5/2) = x+1

316.227766 = x+1

x = 315.227766

OR

log(x+1)^2 = 5

(x+1)^2 = 10^5

x+1 = ±√(10^5) , but clearly x >-1

x+1 = 316.227766..

x = 315.227766..

- math -
**Mutale**, Sunday, March 10, 2013 at 10:00am
1)> log 5 + log 2 + log x = 1

>log (5 X 2) + log x = 1

>1 + log x = 1

>log x = 0

>x = 10^0

>x = 1

#2 has me twisted.

## Answer This Question

## Related Questions

- precalculus - solve the logarithmic equation . express solution in exact form ...
- college algebra - solve the logarithmic equation. Please show all work. log5x+...
- Algebra 2 - Express as a logarithm of a single number or expression: 1. 5log4^p+...
- acc. alg 2 - exponentiating to solve equations: solve the eaquation, cheack for ...
- Logarithm help - using logarithms to solve exponential equations. 5^1+x = 2^1-x...
- check! - here is the question: log5(x-4)= log7x solve for x. These are just base...
- math(log) - find x if a) 1/81=3^2x-1 b)log2x+ 3/log2x = 4
- Algebra 2 - Solve the equation log2(x^2-20) - log2X =3 the two is the base*
- CALC - Solve the Equation: 1. 2^x + 2^-x = 5 2. Log2x + log2(4 – x) = 0 thanks. ...
- Algebra II - Log6(6^9)=??? Answer: 9 Ine^-3x=??? Answer: -3x Use log5(2) = 0....

More Related Questions