Question

the sum of two numbers is18 and their difference is 2. find them​

Answer 1

Answer:

Step-by-step explanation:

Let the 2 numbers be X and Y

Then X+Y=18    - (1)

And X-Y=2        - (2)

Add both the equations

(X+Y)+(X-Y)=18+2

X+Y+X-Y=20

2X=20

X=10

So when X+Y=18 and X=10

Y=18-X

Y=18-10=8

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Answer 2

Let the numbers be x and y

x+y=18

x - y=2

Subtract them

2y=16

y=8

Putting the value of y

x+8=18

x=10