SOLUTION: Solve the system using substitution. y = x + 4 y = 3x

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Question 945147: Solve the system using substitution.

y = x + 4
y = 3x
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

y+=+x+%2B+4......eq.1
y+=+3x......eq.2
------------------------substitute 3x for y in eq.1
3x+=+x+%2B+4......eq.1...solve for x
3x+-x+=+4
2x+=+4
x+=+4%2F2
highlight%28x+=2%29
go to y+=+3x......eq.2 substitute 2 for x and solve for y

y+=+3%2A2
highlight%28y+=+6%29