Ms. Jones wrote the equation below on the board.
x divided by 42=21
If the equation Ms. Jones wrote is true which of the following equations must be true?
Answers:
a. x=21 divided by 42
b. x=21 x 42
c. x=42 divided by 21
d. x=21 plus 42
I am not sure where to begin on this at all. Can you guide me on what to do?
Thank you
x/42 = 21
The first step is to multiply both sides by 42.
x = 882
I think I just solved it.
I just watched a video on how to do division equations so it would be using inverse multiplication.
x/42=21
x/42x42=21x42
x times 1=882
x=882
To check
882/42=21
21/21=1
Do I have the proper understanding of this somewhat.
Let me ask you one thing though. This video that I just watched. I don't understand why they do
x/42x42 and then get x times 1.
Can you explain this?
I can't explain about all of the problem, but the video did it the same way I did.
Ty Ms. Sue
You're welcome, Matt.
Of course! To determine which equation must be true, we need to solve the equation x divided by 42 = 21.
To solve this equation, we can multiply both sides by 42 to eliminate the division:
(x divided by 42) multiplied by 42 = 21 multiplied by 42
This simplifies to:
x = 21 multiplied by 42
To find the value of x, we can calculate the result of 21 multiplied by 42:
x = 882
Now that we have found the value of x, let's compare it to the equations given:
a. x = 21 divided by 42: This equation is not true because 21 divided by 42 is 0.5, not 882.
b. x = 21 multiplied by 42: This equation is true because we found x as 882.
c. x = 42 divided by 21: This equation is not true because 42 divided by 21 is 2, not 882.
d. x = 21 plus 42: This equation is not true because 21 plus 42 equals 63, not 882.
Therefore, the equation that must be true is b. x = 21 multiplied by 42.