Easy way to explain adding and subtracting negative numbers

The sum of three numbers is 3. if the second number is subtracted from the sum of the first and third numbers, the result is 9. if the third number is subtracted from the sum of the first and second numbers, the result is - 5. find the three numbers.

Whats the next number 3 6 4 8 6 12 10

Business people have determined that three sevenths of the items on a mailing list will change in one year. A business has a mailing list of 4382 people. After one year, how many addresses on that list will be incorrect?

How do I factor 8y^3-1000z^6

20/9 in simplest form

What is the place value of 6,064,325 and 3,974,381

How do I do this: 3x-2=4 I don't understand it

This pencil cup is made out of plastic. It is 5 inches tall and has a radius of 1.75 inches. How many square inches of plastic were used to make the cup

Which fraction is equivalent to 15/30 5/6 3/4 2/4 3/5

What is the perimeter of a 8 inch by 6 inch rectangle