seven more that some number equals twenty one

14?

write 3 number sentences that fit wach pattern.

n/n=1
x+y=y+x
2x=x+x
7+a+b

Seven more than some number equals twenty one

To find the number that satisfies the equation "seven more than some number equals twenty one," you need to solve for the unknown number. Here's how you can do it:

Let's represent the unknown number with the variable "x." The equation can be written as:

x + 7 = 21

To isolate the variable "x" on one side of the equation, we need to subtract 7 from both sides:

x + 7 - 7 = 21 - 7

Simplifying the equation further:

x = 14

Therefore, the unknown number is 14.