Easy math question please

determine if its true or not
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1. 3e^x+2=75

a. x= -2+e^25
b. x= -2+ln25
c. x is approximately equal to 1.2189
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2. Log base 4(3x)=3

a. x is approximately equal to 21.3560
b. x= -4
c. x= 64/3
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3. ln( x-1 )=3.8

a. x=1+e^3.8
b. x is approximately equal to 45.7012
c. x= 1+ln3.8
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Answers
for
1:
no,yes,yes approximately

2:
yes approximately, no, yes

3:
yes, yes approximately, no

Try these:

1.

3e^(x+2) = 75
e^(x+2) = 25
ln(e^(x+2)) = ln 25
x + 2 = 25
x = -2 + ln 25

2.

log (base 4) 3x = 3 is equivalent to
4^3 = 3x
64 = 3x
64/3 = x
21.3333333... = x

3.

ln (x-1) = 3.8 is equivalent to

e^(ln (x-1)) = e^3.8
x-1 = e^3.8
x = 1 + e^3.8

big time rush?

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