the sum of a certain number and double that number

the sum of a certain number and double that number

“Twice the sum of 8 and a number” The sum of 8 and a number is written as 8+x. “Twice” means “double” or multiply by 2. 2(x+8)

Addition in math is a process of combining two or more numbers. Addends are the numbers being added, and the result or the final answer we get after the process is called the sum.

A double is a number or an amount that is twice as large as the given number or amount. So, if we multiply a number by 2 or if we add a number to itself, we say that the number is doubled.

the sum of a certain number and double that number

The numbers that occur on both lists have been circled, and are called common multiples. The common multiples of 6 and 8 are 0, 12, 24, 36, 48,… Apart from zero, which is a common multiple of any two numbers, the lowest common multiple of 4 and 6 is 12.