exam Maths Puzzle Numerical Ability

Triangle XYZ with three segments through point p and parallel to the sides of triangle XYZ. This divides the whole region into six subregions. There are three triangular subregions

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Can you please help me figure this one out.

If I invested $10,000, part at 15% and part at 14%.
If the total interest at the end of the year is $1430, how much did I invest at 15%?

Thanks for your help {{{2a+4b}}}