Question

solve the system by using the substitution method. write your answer as an ordered pair.

r+3s=8
s-r=-4

Answer 1

r + 3s = 8 ...........(1)
s - r = -4 ............(2)
If you subtract 3s from both sides of equation (1) you can find r in terms of s.
Then substitute this value of r into equation (2) and rearrange to find the value of s.

Answer 2

....? im not that smart

Answer 3

Taking the first step we subtract 3s from both sides of equation (1) and get:
r + 3s - 3s = 8 - 3s ..............(3)
Now simplify the left hand side of equation (3). Can you do that?