exam Maths Puzzle Numerical Ability

4/x
______
3- 1/x

In case it is hard to read...the problem is four over x over three minus one over x. My book says the answer is four over three x minus one but i am having difficulty reaching that answer.

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exam Other Question

Assume that y varies directly as x. If y =4 when x = 1/2, find y when x =2 write the equation of the line in standard form that satisfies the following conditions.
a.) m=3/5, passes through (2,1)
b.) passes through (2,-3) and (-3,7)
c.) m=3 and y-intercept = -8
d.) x-intercept = 2 and y-intercept =3