Asked by brooklyn

the sum of two numbers is 31 and their difference is 7 what are the two numbers?
Answered by PsyDAG
Let x = one number and x+7 the other.

x + x + 7 = 31

Solve for x, then x+7.
Answered by Bosnian
a = first number

b = second number


You have conditions:

a + b = 31 and a - b = 7

Add the two equations together to eliminate b from the system.

a + b = 31
+
a - b = 7
________

a + a + b + ( - b ) = 31 + 7

2 a + b - b = 38

2 a + 0 = 38

2 a = 38 Divide both sides by 2

a = 38 / 2 = 19


a - b = 7

19 - b = 7 Add b to both sides

19 - b + b = 7 + b

19 = 7 + b Subtract 7 to both sides

19 - 7 = 7 + b - 7

12 = b

b = 12


Proof:

a + b = 19 + 12 = 31

a - b = 19 - 12 = 7
Answered by malik
the key answer of this question the sum of two numbers is 31 and their difference is 7
Answered by Mariama32
OOOKKKAAAYYY AND?!
Answered by がゔぃｎ
i am confusions
Answered by anonymous
This doesn't make no sense. This is wack.
Answered by wat
wat
Answered by lazarus
its 19 and 12
Answered by lazarus
its 19 and 12 cuz 12 7 numbers behind 19 12+7=19 so its 12 and 7
Answered by lazarus
sorry its 12 and 19 not 12 and 7
Answered by Audrey
It is 19 and 12
Answered by Mrs. Smith
This is such confusion.
Answered by jayden leung
its 12 and 19
Answered by Drew
What is the point of this
Answered by Eliza
Um...OK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answered by sam
confused.
Answered by Jimmy
What’s the answer!
Answered by Alexis
12 and 19
Answered by anya
woooooooooooooooooooooooooooot?!!?!?!?!?!?!?!?!?!?!?!?!?
Answered by Trisha
If you cauculate, the answer is 12 + 19 = 31
19 - 12 =7

So whoever answer 19 and 12, you are correct!!!!!!!
Answered by Trisha
Also, what's the two numbers that sum up to 134, and it's the difference of 66?
Answered by evan snow
that helped me
Answered by Yashika
12 and 19 is the answer
Answered by Emmaha6
This is... :l
Answered by kamarion
ha ha ha ha ha ha ha 19 and 12 (haaaaaaaaaaaaa)
Answered by kamarion
19 and 12
Answered by Lunar
This is confusing... :'>
Answered by Anonymous
Wsp the answer is 19 and 12
Answered by Unknown
There is know need to fight between each other BECAUSE IT IS ALL MIneeeeeeeeeeeeee !🎯🎵🎵🎵🎵🎵🎵🎵🎵
Answered by Nicholas
What are the two numbers
Answered by Anonymous
Lamo?
Answered by unknown
got it