SOLUTION: how do you slove y=-x+4 y=3x by substitution

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Question 841823: how do you slove y=-x+4 y=3x by substitution

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Simply by substituting,
y=-x%2B4
3x=-x%2B4 Add x to both sides.
4x=4 Divide both sides by 4.
x=1
They go back to either equation.
y=3x
y=3%281%29
y=3