exam Maths Puzzle Numerical Ability

add and simplify

1 + x-1
-----+ -------
x+2 + x-2

thank you

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exam Other Question

My question is combination word problem and cost function. I struggle a lot with these. Please assist.
In the following, a cost function is given. Find the average cost per item It costs $1.50 per day to place a one line ad in the classifieds plus a flat service fee. One day costs $3.50 and four days costs $8.00. Write a linear equation that the cost in dollars, y, in terms of the number of days the ad appears, x.