SOLUTION: Solve the system of equations algebraically. x - 2y = -25 3x - y = 0

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Question 934314: Solve the system of equations algebraically.
x - 2y = -25
3x - y = 0
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

x-2y+=+-25.....eq.1
3x+-y+=+0.....eq.2
----------------
x-2y+=+-25.....eq.1...solve for x
x=+2y+-25...substitute in eq.2

3%282y+-25%29+-y+=+0.....eq.2..solve for y
6y+-75+-y+=+0
5y=+75
y=+75%2F5
y=+15
now find x
x=+2y+-25
x=+2%2A15+-25
x=30+-25
x=+5

solution is:
x=+5 and y=+15
means, the intersection point of these two lines is at (5,15)

+graph%28+600%2C+600%2C+-10%2C+10%2C+-10%2C+20%2C+x%2F2%2B25%2F2%2C+3x%29+