The sum of -4 and 8 times a number is multiplied by 3. The result is 15 less than 25 times the number. What is the number?
a. -12
b. 6/7
c. 0
d. 3
e. none of the above

Question

The sum of -4 and 8 times a number is multiplied by 3. The result is 15 less than 25 times the number. What is the number?
a. -12
b. 6/7
c. 0
d. 3
e. none of the above

shadowlegendx. · Answer

This is simply changing words into an equation/expression

anonymous · Answer

i got none of the above.

shadowlegendx. · Answer

Do you know what the "sum" means?

anonymous · Answer

yes. sum is the answer.

anonymous · Answer

the total.

texaschic101 · Answer

the sum means add

anonymous · Answer

yeah i know that. its the total in an addition problem though

shadowlegendx. · Answer

$$-4 + 8 \times y \times 3 = 25 - 15 \times y$$

anonymous · Answer

That's the exact same problem i wrote out from the question.

shadowlegendx. · Answer

Ok good!

anonymous · Answer

but when i plugged in the numbers i didn't get anything that matched

shadowlegendx. · Answer

Now we just do PEMDAS and like terms to solve

shadowlegendx. · Answer

-4 + 24y = 10y

shadowlegendx. · Answer

From that we would just further isolate the variable to get

$$y = \frac{ 2 }{ 7 }$$

anonymous · Answer

that's what i got as well, which isn't one of the answer choices. so that would make E. none of the above correct, right?

shadowlegendx. · Answer

As we can all see, that is not one of the answers so it must fall into the "none of the above" category :)

shadowlegendx. · Answer

Yes, you are correct!

anonymous · Answer

alright, i had all the right steps then. i'm just trying to check over my answers because i'm studying for an upcoming exam right now. thank you :)