The buyer of a house paid PHP 10,000 in cash and committed to pay "x" pesos every six months for the next 10 years. He missed the first five payments of "x" pesos each. He wants to pay the house in a...

The buyer of a house paid PHP 10,000 in cash and committed to pay "x" pesos every six months for the next 10 years. He missed the first five payments of "x" pesos each. He wants to pay the house in a single payments PHP 53,293 at the end of the third year, which will cancel both his accrued and future liabilities. If money has a value of 6% per year compounded semi-annually, find the value of "x".