exam Maths Puzzle Numerical Ability

I need help with a question that says: solve each of the following for x
*1/8=4^(6x+2)
*(1/4)^x=256
*log10x=4

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exam Other Question

A line has the equation 2x-y=3
What is the equation of a line passing through the point (1,-2) that is parallel to this line.
Find the equation of a line passing through the poin
(t+2)/t + 3/(t+1) =?
I cannot remember what to do for the first step please help.