Why should you record a 1 in the Tens column when you regroup in a addition problem

What is the answer to 12x+6=18-48-9x

5 friends share 8 apples The answer is

How do you solve b+4/7=-3

Anthony has 36 bats evenly spread between 4 bags. He gave bats to players from one bag. The first player got three bats and the second player got 4 bats. How many bats are remaining in one bag. answer

Sole the equations for (x, y) 3x+y=1 and x-y = - 5

F the first three numbers of a proportion are 19, 38, 11, find the fourth proportional is

Round 93.0129 to the nearest thousandth

a hot air balloon is 10 meters above the ground rising at a rate of 15 meters per minute. another hot air balloon is 150 meters above the ground and descending at a rate of 20 meters per minute.

The highest and lowest temperatures ever recorded in the united states are 134° at Death Valley, California, and - 80° aT prospect Creek, Alaska. What is the difference in these temperatures extremes?

The difference between 22 and x