SOLUTION: Solve the system and Provide for me the solution and a graph. 7y – 3x = 25 Y = 3x + 1

Algebra ->  Coordinate Systems and Linear Equations  -> Lessons -> SOLUTION: Solve the system and Provide for me the solution and a graph. 7y – 3x = 25 Y = 3x + 1       Log On


   

Question 837817: Solve the system and Provide for me the solution and a graph.
7y – 3x = 25
Y = 3x + 1
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
7y+-3x+=+25....eq.1
y+=+3x+%2B+1....eq.2 ......substitute y in eq.1
______________________

7%283x%2B1%29+%96+3x+=+25 ....eq.1....solve for x
21x%2B7+%96+3x+=+25
18x+=+25-7
18x+=+18
highlight%28x+=+1%29
go back to eq.2 and solve for y
y+=+3%2A1+%2B+1 ....eq.2
y+=+3+%2B+1
highlight%28y+=+4%29

+graph%28+600%2C+600%2C+-5%2C+5%2C+-10%2C+10%2C+%283%2F7%29x%2B25%2F7%2C3x%2B1%29+