Question

If 47.256 is equal to 4a+7b+2c+5d+6e find 5a+4c+7e

Answer 1

If you notice the numbers before the variables are the same as in the answer. Therefore, all we need to know is about the placement in the number system. So a has to be 10, b has to be 1, c has to be 0.1 d 0.01 and e 0.001. You can now very easily find the value of 5a + 4c + 7e. It will 50 + 0.4 + 0.007 = 50.407