Which equation represents "the sum of eight times a number and seven is twice the number"?
8(7 + 2N)
8N = 7 + 2N
7N + 8 = 2N
8N + 7 = 2N
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If a number is N, what is eight times the number?
im not completely sure
A number is 5
What is eight times that number?
Not the answer you are looking for? Search for more explanations.
How did you do that?
You used multiplication.
Since the number was 5, and we wanted 8 times the number, you did 8 * 5.
Then you actually multiplied the numbers together and got 40.
That was correct. You could do the multiplication because you knew what both numbers were.
i whant to be sure its D
In our case, we don't know what number N is.
We just know N represents a number.
Then 8 times the number is simply 8 times N, which is 8 * N, or even more simply,
Ignore direct answers, and learn from an explanation.
times is multiplacation 8n
then sum is addition 8n+7
twice a number is 2n
OK so far?
The unknown number is N.
8 times the number is 8N.
ok i see
Then the next step is:
"the sum of eight times a number and seven"
"Sum" is an addition, so we have:
8N + 7
i have anouther i whant to see if i got correct ill post it
Finally, the problem tells us that all that is twice the number.
That means 8N + 7 = 2N