SOLUTION: Solve the following system of equations for x: 2x + y = 10 3x = y

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Question 252406: Solve the following system of equations for x:
2x + y = 10
3x = y
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Note: Since 3x=y, this means that y=3x


2x+%2B+y+=+10 Start with the first equation.


2x+%2B+3x+=+10 Plug in y=3x


5x=10 Combine like terms on the left side.


x=%2810%29%2F%285%29 Divide both sides by 5 to isolate x.


x=2 Reduce.


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Answer:

So the solution is x=2


Note: if you need to find 'y' as well, simply plug x=2 into y=3x to find its value.