12 - 3b = what? for b = 4.3
12 - (3 * 4.3) =
12 - 12.9 = -0.9
Thank you I just didn't know if it was supposed to be a negative number or not. My math that I have is really confusing.
You're welcome.
Think about a number line.
http://www.mathsisfun.com/number-line.html
When you take 12 from 12, you arrive at 0. Then you have to go to the negative side of the line.
Consider money. If you have $12 and buy something for $12.90, you have to borrow 0.90 to make your purchase.
To find the value of 12 - 3b when b is equal to 4.3, you can substitute b with 4.3 in the equation and solve for the answer.
Step 1: Substitute b with 4.3 in the equation, 12 - 3b.
12 - 3(4.3)
Step 2: Perform the multiplication first.
12 - 12.9
Step 3: Subtract 12.9 from 12.
-0.9
Therefore, when b is equal to 4.3, the value of 12 - 3b is -0.9.