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Musya8 [376]
2 years ago
11

The sum of two numbers is 12. The difference of the same two numbers is −4. Find the two numbers.

Mathematics
2 answers:
Amanda [17]2 years ago
8 0

Answer: x = 4, y = 8

Step-by-step explanation:

Let the two numbers be x and y

sum of the two numbers will be

x + y =  12 ------------------------------1

Difference of the two numbers

x - y  =  -4 ----------------------------- 2

Now, to find the two numbers , we solve equation 1 & 2 together

  x + y =  12

  x - y  =  -4

we now add the two equations to eliminate y

   2x =  8

      x = 4.  Now to find the value of y, we substitute for x in any of the equation above

 x + y  = 12

 4  + y = 12

        y =  12 - 4

        y  =  8

   

Butoxors [25]2 years ago
7 0

Answer:

  4 and 8

Step-by-step explanation:

Let 'a' represent one of the numbers. Then the other is 12-a, and their difference is ...

  a - (12-a) = -4

  2a = 8 . . . . add 12

  a = 4 . . . . . divide by 2

  12-a = 8 . . . . find the other number

The two numbers are 4 and 8.

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means:

if the price is decreased by 1-3$:
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If R is the function of the revenue depending on x, then 

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Answer: R(x)=(340+4x)(75-3x) dollars

8 0
3 years ago
X + 67 = 70 <br><br> what does "x" equal?<br><br> Please explain your answer, thanks!
8_murik_8 [283]
Hey there!

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so your answer will be:
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Hope this helps!
Have a great day (:
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