Question

x + y = 3 and y = x + 3

Answer 1

?

Answer 2

find x and y?

Answer 3

x+y=3
x+(x+3)=3
2x+3=3
2x=0
x=0
y=3

Answer 4

Use either elimination or substitution to find the solutions (if any)

Answer 5

I use substitution

Answer 6

x=0
y=3