exam Maths Puzzle Numerical Ability

I need help with simplifying:
3/x+1 + 3
/ divided by 3x/x-1 -3.

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exam Other Question

Marilyn drove her car from Amarillo to Dallas at an average rate of 55 miles per hour and returned over icy roads averaging only 30 miles per hour. Find the time going and the tim Find the product or quotient. Write your answer using only positive exponents.

Mass of a dust particle:0.000000000753 kilograms

Any help with this equation woul be GREATLY</b> appreciated.