SOLUTION: Use the substitution method to solve the system of equations. Please show all work! y = 2x + 1 3x - y = 4

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Question 862046: Use the substitution method to solve the system of equations. Please show all work!
y = 2x + 1
3x - y = 4
Found 2 solutions by Alan3354, ben720:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Sub for y in the 2nd eqn

Answer by ben720(159) About Me  (Show Source):
You can put this solution on YOUR website!
y=2x+1
3x-y=4
First, you can substitute 2x+1 for y in the second equation because y and 2x+1 are the same.
3x-%282x%2B1%29=4
Distribute -1
3x-2x-1=4
Combine Like Terms
x-1=4
Add one to both sides
x=5
Substitute 5 into y=2x+1
y=2%285%29%2B1
y=10%2B1
y=11

X=5 and Y=11