nauticajanke03
09.07.2019 •
Mathematics
What is the solution to the equation below?
log 20х3 - 2logx = 4
x=25
x=50
x=250
x=500
Solved
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Ответ:
x = 500.
Step-by-step explanation:
log20x^3 - 2logx = 4
By the laws of logs:
log20x^3 - logx^2 = 4
log(20x^3 / x^2) = 4
20x^3 / x^2 = 10^4
20x = 10,000
x = 10,000 / 20
x = 500.
Ответ:
Step-by-step explanation:
4x+3x=140
7x=140
x=140/7
x=20
4x=80
3x=60