SOLUTION: Solve the following systems by substitution. 4x - 12y = 5 -x + 3y = -1

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Question 71882This question is from textbook
: Solve the following systems by substitution.
4x - 12y = 5
-x + 3y = -1 This question is from textbook

Answer by elima(1433) About Me  (Show Source):
You can put this solution on YOUR website!
4x - 12y = 5
-x + 3y = -1
lets go ahead and solve the second equation for x;
-x + 3y=-1
subtract 3y from both sides;
-x = -1 - 3y
multiply each side by -1
(-1)-x = -1 - 3y (-1)
x = 3y+1
now lets plug that into the first equation for x;
4(3y + 1) - 12y = 5
12y + 4 -12y = 5
4=5
system is inconsistent, no common solution set
:)