Question

How do I solve this equation for x? (Will give medal & fan)

10 = 3^(x+5) - 2

Answer 1

1) add 2
2) take natural lot
3) use log rule
4) divide ln(3)
5) subtract 5

:DDD

Answer 2

I don't know what the log rule is ):

Answer 3

And 4 isn't an answer option for this

Answer 4

@cutrightceo try plugging in x=4:
10 = 3^(4+5) - 2
10 = 3^9 - 2
10 = 19681

is 10 equal to 19,681??


Take logs of both sides (add 2 to both sides first):
log12 = log3^(x+5)
now you can bring down the exponent

log12 = (x+5)log3

Answer 5

so 1.079 = (x + 5)0.477

Answer 6

I think I can solve it from here (: thank you!

Answer 7

final answer I got is -2.738 (rounded to the nearest thousandth)

Answer 8

http://www.wolframalpha.com/input/?i=10+%3D+3%5E%28x%2B5%29+-+2+real+solution

Answer 9

Okay (: thank you