exam Maths Puzzle Numerical Ability

if f(1-x)+2f(x)=x

compute
{{{f(x)}}}

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exam Other Question

Please help solve the following problem:
Find the exact, rationalized value of tan 105 degrees.
The answer choices are:
1. -2 - sqrt3
2. (-1/2) + sqrt3
3. (sqrt3 - 1)/(1 + sqr
1. Find (a) the slope and (b) the y-intercept of the line determined by the given condition.

It's equation is y - 3x = 4.

It contains the points (2,4) and (3,5).