SOLUTION: please help me solve this problem im stuck. x-3y=8 amd y=2x+1 then x=

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Question 206135: please help me solve this problem im stuck.

x-3y=8 amd y=2x+1 then x=
Answer by Marth(57) About Me  (Show Source):
You can put this solution on YOUR website!
x-3y=8 and y=2x%2B1
You want to know x.
To eliminate y, solve for y in both equations, and substitute to eliminate y.
y=2x%2B1
x-3y=8
%28x-8%29%2F3=y
Substitute y=2x%2B1 for y in the second equation.
%28x-8%29%2F3=2x%2B1
x-3=6x%2B3
-6=5x
x=-6%2F5