Question

Solving by using substitution. Give steps please. Thanks

y+x=3
y=x-1

Answer 1

y+x = 3
y = 3 - x -> Subtract x
3-x = x - 1 -> Sub. "3-x" for y
3 = 2x - 1 -> Add x
4 = 2x Add 1
2 = x divide by 2
x= 2