Question

Solve this system of by rewriting the statements into a set of 2 equations. Then solve the equations using the addition method.
Question: The sum of two numbers is 21. The difference of the two numbers is 19. What are the two numbers? PLEASE HELP SOMEONE!!!!!

Answer 1

what does sum mean?

Answer 2

sum means add two numbers, but dont know what they are so call one x and the other one y
x + y = 21

The other equation will be the difference of 2 numbers (x and y again) = 19
can you write that one?

Answer 3

I honestly don't know what's its asking im guessing it wants to know the x and they y values im so lost

Answer 4

It is asking you to write two equations that represent the situation,
first we need to translate
x + y = 21 the sum of 2 number is 21
x - y = 19 the difference of 2 number is 19

do you see where I got that?

Answer 5

i think i am making this really hard on myself but thank you for helping me through(:

Answer 6

now we need to solve it.
this is a system of equations, we need to eliminate one of the variables.
if we add the two equations together ---

x + y = 21
x - y = 19
__________
2x = 40 now that is an equation we can solve, divide both sides by
x = 20 2

do you follow me at all?

Answer 7

OOOOOOOOOO My gosh!!!!!! Blonde moment i finally understand it i have to set up the equations after that slove them and then i get my X and Y value Right!!

Answer 8

one of the number is 20, do you know how to find the other?

Answer 9

um i think im not that sure :/

Answer 10

x = 20 , substitute that back into either one of the equations

ie x + y = 21

20 + y = 21 solve that to find the other number

Answer 11

Ahhh gracias(: u da best(:

Answer 12

thanks

Answer 13

No Thank You!!!