Question

I have two numbers that have a sum of 16 and a difference of 3. By forming two equations and solving them find the two numbers.

Answer 1

x+y=16
x-y=3

just add them, to find x
subtract them to get y

Answer 2

X= 16+3=19
Y= 16-3=13
X=19
Y=13

Answer 3

X+Y=16___EQ1
X-Y=3____EQ2
2Y=13
Y=13/2
Y=6.5
Substitute Y=6.5 into EQ2
X-Y(6.5)=3
X-6.5=3
3+6.5=9.5
So:
X=9.5
Y=6.5

Answer 4

no