SOLUTION: Show all your work to receive full credit for this problem. Use the Substitution method to solve the system of equations. Give your answer as an ordered pair (x,y). x +

Algebra ->  Systems-of-equations -> SOLUTION: Show all your work to receive full credit for this problem. Use the Substitution method to solve the system of equations. Give your answer as an ordered pair (x,y). x +      Log On


   

Question 121547: Show all your work to receive full credit for this problem.
Use the Substitution method to solve the system of equations. Give your answer as an ordered pair (x,y).


x + y = -5
x - y = 3

Answer by algebrapro18(249) About Me  (Show Source):
You can put this solution on YOUR website!
x + y = -5
x - y = 3

I would start off by solving equation 2 for x

x = 3 + y

now substitute this value into the first equation and solve for y.

3 + y + y = -5 --> Combine like terms
3 + 2y = -5 --> Subtract 3 from both sides
2y = -8 --> divide both sides by 2
y = -4

now that we have a y value we can go back and solve for x.

x = 3 + -4
x = -1

the solution is (-1,-4)