Solve each exponential equation algebraically using logarithms. 1). 10^x=120
2). e^x=63
3). 5(10)^x=40
4). 10^x-2=57
5). e^x+9=25
6). 10^2x=200

1). 12 is the answer for number 1

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: