Question

Can someone help me with using the addition-subtraction method? x+y=7 x-y+3

Answer 1

*x-y=3

Answer 2

x+y=7
x-y=3 now add the two and you get

2x = 10 ( y and -y when added = 0)
so x = 10/2 =5

now substitute x=5 in any of the given equation and get value of y

Answer 3

Can you do that one by one with me in the equation form? I live better though example.

Answer 4

Write the given equations one below the other. we see that in first one we have a positive y and in the second one we have negative y. when added they will cancel each other out.

x+y=7 -- (I)
x-y=3 -- (II) now add the two and you get
------
2x = 10

x = 10/2
x = 5


Understood till this step ??

Answer 5

OHHHHH! I get now I for some reason thought that one of the x's was negative and I was going crazy! Thanks so much!! :)

Answer 6

u r welcome....☺
you know the steps after this...??

Answer 7

Think you can help me with one more problem?

Answer 8

@HappySoul