What unknown number makes these equation true. 447+99 =447+100-
21
To find the unknown number that makes the equation true, let's break down the equation step by step.
The given equation is:
447 + 99 = 447 + 100 -
To solve this equation, we need to find the number that completes the equation after the subtraction symbol "-". Let's represent that unknown number with the variable "x".
Now, we can rewrite the equation as:
447 + 99 = 447 + 100 - x
To solve for "x", we need to isolate it on one side of the equation.
By subtracting 447 from both sides of the equation, we get:
447 + 99 - 447 = 447 + 100 - x - 447
Simplifying:
99 = 100 - x
Next, we can isolate "x" by subtracting 100 from both sides of the equation:
99 - 100 = -x
Simplifying further:
-1 = -x
To find the value of "x", we can multiply both sides of the equation by -1 (to remove the negative sign):
-1 * -1 = -x * -1
Simplifying:
1 = x
Hence, the unknown number that completes the equation is 1.