SOLUTION: If anyone could please help me to solve these four problems it would be awesome! I am extremely lost. Please help! Thanks!! They use the Substituion Method & Addition Method. I can

Question 430714: If anyone could please help me to solve these four problems it would be awesome! I am extremely lost. Please help! Thanks!! They use the Substituion Method & Addition Method. I can't figure out the solution sets. Thank you!
#1 Substituion Method:

#2 Substituion Method:

#3 Addition Method:

#4 Addition Method:

Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
#1 Substituion Method:
--> y = 1-x

(x-5)*(x+2) = 0
x = -2, y = 3 (-2,3)
--------------
x = 5, y = -4 (5,-4)
-----------------------
-----------------------
#2 Substituion Method:

Similar to #1
-------------------
#3 Addition Method:

1st eqn x 5
2nd eqn x 2
------------------------- Subtract

y = +2, -2
Sub for y, find x
There are 4 intersections
------------------
------------------
#4 Addition Method:

Similar to #3, just subtract to eliminate y^2 terms

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