Answer:
15
Explanation:
To find the number that is 30 less than 3 times itself, you can set up an equation and solve for it.
Let's call the number "x." So, we have:
3x - 30
Now, we want this expression to equal a number:
3x - 30 = ?
To solve for x, we can set it equal to 30 less than 3 times itself:
3x - 30 = x
Now, let's isolate x:
3x - x = 30
2x = 30
Now, divide both sides by 2:
x = 30 / 2
x = 15
So, the number is 15.