Please find the length of the missing side

Simplify 5 square root of 7 end root plus 12 square root of 6 end root minus 10 square root of 7 end root minus 5 square root of 6 . (1 point) 5 square root of 14 end root minus 7 square root of 12 5 square root of 7 end root minus 7 square root of 6 7 square root of 12 end root minus 5 square root of 14 7 square root of 6 end root minus 5 square root of 7

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Combine the information in the problem and the chart using the average balance method to solve the problem.