SOLUTION: Estimate the solution by graphing. then use the addition method to solve the system. y=x-7 x+y=3

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Question 165491: Estimate the solution by graphing. then use the addition method to solve the system.
y=x-7
x+y=3
Answer by jojo14344(1513) About Me  (Show Source):
You can put this solution on YOUR website!
y=x-7---> EQN 1
x%2By=3---> EQN 2
Combine similar terms in EQN 1 then add to EQN 2:
y-cross%28x%29=-7
cross%28x%29%2By=3
=2y=-4 -----> cross%282%29y%2Fcross%282%29=-cross%284%292%2Fcross%282%29
=highlight%28y=-2%29
For x:
via EQN 1: -2=x-7 ---> -2%2B7=x ---> highlight%28x=5%29
See graph:
--- see both lines interesect at points(5,-2)
*Remember: green line ---> x%2By=3
Red line ----> y=x-7
Thank you,
Jojo