Find the variable :
4t + 5.25 = 35.25

65 8 7 4 5 6 8 4 3 2 1 9 5 6 4 2 1 6 5 1 5 1 3 2 3 5 multiply the third number in the first row by the seventh number in the third row. add this result to the fifth number in the second row. add to this total ten times the fourth number in the third row. subtract the eighth number in the first row from the result.

How do you find principle and simple interest

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?