book Maths Puzzle Numerical Ability

Please help me solve this equation algeracially.
0=x-3-(10/x)
the (10/x) is showing that it is a fraction. I am terrible at solving these. Thank you!

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book Other Question

Nicole has $3.15 in nickles, dimes and quarters. She has 3 more nickles than quarters and two times as many dimes as quarters. How many coins of each kind does she have? Show Equation. Luke started walking from his home at noon. By 2 p.m. he reached the park, which is 3 miles away.
A. write an equation that relates time x and distance y from home, assuming Lu