1.manolo invested some money at 7% and some at 8%. he invested php 8,000 more at 8% than 7%. he earned a yearly interest ofphp 6,640.00. how much was invested at each rate?let x be the amount of money invested at 7%y be the amount of money invested at 8%y = _____________equation:0.07x + 0.08(x + 8000) = 6640solution:answer. php_________2. marina invested some money at 5% and some at 7%. she invested php 5,000 more at 7% than 5%. she earned a yearly interest of php 2,150.00. how much was invested at each rate?let x be the amount of money invested at 5%y be the amount of money invested at 7%y = ___________equation:_____ = (____) (____)solution:answer. php________need ko na po plsss