SOLUTION: x + 3y = −8, 4x − 3y = 23

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Question 701022: x + 3y = −8,
4x − 3y = 23
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
x + 3y = −8
x=-3y-8 replace x with (-3y-8) in the second equation & solve for y.
4x − 3y = 23
4(-3y-8)-3y=23
-12y-32-3y=23
-15y=23+32
-15y=55
y=55/-15
y=-11/3 ans.
x+3(-11/3)=-8
x-33/3=-8
x-11=-8
x=-8+11
x=3 ans.
Proof:
4*3-3(-11/3)=23
12+33/3=23
12+11=23
23=23