Posted by **Anonymous** on Saturday, July 14, 2007 at 11:42am.

solve for x without using a calculator

5^(x+1) = 25

i know that x would equal 1 because 5^2 is 25, but i don't know how to show how to solve it

All you need to do is what you just did: Explain that if x = 1, the equation is satisfied.

If you are looking for a method of solution other than a guess that happens to work, take the log of both sides of the equation.

(x+1) log 5 = log 25

x+1 = log 25/log 5 = (log 5^2)/log5

= (2 log 5)/log 5 = 2

x = 1

solve for x without using a calculator

5^(x+1) = 25

5^(x + 1) = 25 = 5^2

Therefore, (x + 1) = 2 making x = 1.

- math -
**Anonymous**, Monday, October 8, 2007 at 5:27pm
(x+1)(x-1)=5(x-1)

## Answer This Question

## Related Questions

- math - Solve for x (without using a calculator): log base 3 of x^2= 2log base 3 ...
- Precalculus - Solve the equation x^3 - 2x + 4 = 0. ==> I know the answer is -...
- Math - Hi,I need to know how to do question like this without using a calculator...
- Math - I just don't understand this question: h(t)=A*b^x h(3)=4 h(5)=40 Solve ...
- Algebra 2 - I need help with this problem because I do not have a graphing ...
- Math - solve for x without using a calculator: log5(3^x) = log25(9^(1-2x)) I don...
- math/trigonometry - solve secx/2=cosx/2 over the interval[0,2pi) without using a...
- algabra - Note: Remember to show all of the steps that you use to solve the ...
- pre calc - how do u solve for x and y of x+2y=7 2x+y=8 using matrix without ...
- Math - I need to show how to solve this: Question - 50.50/ 0.5 The calculator ...

More Related Questions