SOLUTION: Can someone help me solve this solution system using the substitution elimination method? 4x+2y= -14 -7x+y = 56

Question 457157: Can someone help me solve this solution system using the substitution elimination method?
4x+2y= -14
-7x+y = 56
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Using elimination
4x + 2y = -14
-7x + y = 56
multiply the 2nd equation by -2
4x + 2y = -14
14x - 2y = -112
-----------------adding eliminates y, find x
18x = -126
x =
x = -7
:
Find y using the 1st equation
4(-7) + 2y = -14
-28 + 2y = -14
2y = -14 + 28
2y = 14
y =
y = +7
:
;
Check solution in the 2nd equation
-7x + y = 56
-7(-7) + 7 = 56
+49 + 7 = 56; confirms our solutions
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