SOLUTION: solving systems of equations solve the system of equation { x+y=7 x-y=13 i know the answer is (10, -3) my question is how? can someone show me a step by ste

Algebra ->  Systems-of-equations -> SOLUTION: solving systems of equations solve the system of equation { x+y=7 x-y=13 i know the answer is (10, -3) my question is how? can someone show me a step by ste      Log On


   

Question 473862: solving systems of equations
solve the system of equation

{ x+y=7
x-y=13


i know the answer is (10, -3)
my question is how? can someone show me a step by step on how to do this?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
x+y=7
x-y=13
--------- Add
2x = 20
x = 10
------
y = -3