SOLUTION: 5.6 Solve the system by the method of your choice x=6y+2 3x-18y=6 The solution set is { } (type and ordered pair)

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Question 1012161: 5.6
Solve the system by the method of your choice
x=6y+2
3x-18y=6
The solution set is { } (type and ordered pair)
Found 2 solutions by MathLover1, MathTherapy:
Answer by MathLover1(20849)   (Show Source): You can put this solution on YOUR website!

......eq.1
......eq.2
---------------------
......eq.1
......eq.2
---------------------

Solved by pluggable solver: Solve the System of Equations by Graphing



Start with the given system of equations:










In order to graph these equations, we need to solve for y for each equation.




So let's solve for y on the first equation


Start with the given equation



Subtract from both sides



Rearrange the equation



Divide both sides by



Break up the fraction



Reduce



Now lets graph (note: if you need help with graphing, check out this solver)



Graph of




So let's solve for y on the second equation


Start with the given equation



Subtract from both sides



Rearrange the equation



Divide both sides by



Break up the fraction



Reduce





Now lets add the graph of to our first plot to get:


Graph of (red) and (green)


From the graph, we can see that the two lines are identical (one lies perfectly on top of the other) and intersect at all points of both lines. So there are an infinite number of solutions and the system is dependent.
Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!

5.6
Solve the system by the method of your choice
x=6y+2
3x-18y=6
The solution set is { } (type and ordered pair)
x = 6y + 2 ------- eq (i)

3x - 18y = 6_____3(x - 6y) = 3(2)_____x - 6y = 2_____x = 2 + 6y ------ eq (ii)

As seen, both equations are the same, so the system has an INFINITE NUMBER of solutions. 

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