exam Maths Puzzle Numerical Ability

Solve and check each of the following equations for x. This is easy and i think I am thinking to hard. Please help.
x/6 - x/8 = 1

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exam Other Question

I have my final tomorrow and cannot figure these problems out. I need to know HOW to work the problem out.

1. Find the slope and the y-intercept for the follwing equation of a line.
y=1/3x-2/3

2. same as above but for 6x + 3y = 12
Write this using radical notation

-X^-3/4=