SOLUTION: please help me solve this equation log(x) + log(x - 90) = 3

SOLUTION: please help me solve this equation log(x) + log(x - 90) = 3

Algebra.Com

Question 170821: please help me solve this equation log(x) + log(x - 90) = 3
Answer by KnightOwlTutor(293) (Show Source): You can put this solution on YOUR website!
We know that the log base is 10 therefore
x(x-90)=1000
x^2-90x-1000=0
Let's factor this equation
(x-100)(x+10)=0

x=100
log 100 +log(100-90)=3
2+1=3

RELATED QUESTIONS
Please help me solve this equation:... (answered by lwsshak3)

please help me solve this equation 1/4 log x-3 log y-log... (answered by MathLover1)

Please help me solve this equation:... (answered by Alan3354)

Please help me solve this equation:... (answered by jsmallt9)

Please help me solve this equation: log 3(x+6)+log 3(x-6)-log... (answered by josgarithmetic,MathTherapy)

please help me solve this log (6x+5) - log (3) = log (2) - log... (answered by solver91311)

Please help me solve this equation:... (answered by stanbon)

please help me solve this equation: {{{ log(2,log(3,x))=3... (answered by user_dude2008)

please help me solve this equation; log(base 6)3x + log(base 6)(x-1) = 3 (answered by nerdybill)