Thread: Solve For the Unknown (ln equation)

A. 2ln2x=8
B. 2e^2x-3e^x=-1
C. 6e^-5x+13=15

I have no clue how to solve any of these, since I missed a pre-cal class and when you miss a pre-cal class.. Things hit the fan. Could anyone offer an explanation?

For the first one, divide both sides by 2, then take both sides to the power of e.

For the second make u= e^x, then solve the resulting quadratic.

For the third take 13 from both sides, divide both sides by 6 and then take the ln of both sides.

what do you get?