Log Question help needed!!

[alexandra.vo]

Hey, I really need help with this log question!

If log10(x−2)−3log102x=1−log10 y , find what y equals to.

 

[tkhunny]

You could just say "all logs are Base 10" and write:

log(x-2) - 3log(2x) = 1-log(y)

MUCH easier to read.

Use your log rules. You may wish to note that log(10) = 1, since we already said "logs are base 10".

 

[alexandra.vo]

Thankyou so much! That defs makes it really easier to solve!!
Sorry to be a pain could you also help me with this question, I got -3 as the answer?

Find the value of m for which the following simultaneous equations have infinitely many solutions

mx−4y=6

3x−(m−1)y=2m

 

[Steven G]

This is a math help forum. Can you tell us what help you need? If you showed us your work as the posting guidelines ask you to do you would have received help by now.