SOLUTION: Solve the system using substitution. y = 2x + 7 y = 5x + 4

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Question 945142: Solve the system using substitution.

y = 2x + 7
y = 5x + 4
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!
y+=+2x+%2B+7......eq.1
y+=+5x+%2B+4......eq.2
-----------------------------substitute 5x+%2B+4 for y in eq.1
5x+%2B+4+=+2x+%2B+7......eq.1...solve for x
5x-2x+=+7-4
3x+=+3
x+=+3%2F3
highlight%28x+=+1%29
go to y+=+5x+%2B+4......eq.2 substitute 1 for x and solve for y
y+=+5%2A1+%2B+4
highlight%28y+=+9%29