Solve the system of linear equations
3x+y=0
2x-y=5

Question

Solve the system of linear equations 
3x+y=0
2x-y=5

anonymous · Answer

Pick one of them and solve for any variable. So let's say you solve for x in the first equation, okay? So you'll get x=-y/3. Simply plug that into your second equation to solve for your actual value for y, then plug that back into the first question to find x, and you'll get your x value. The two y and x values are your coordinates for your solution. The solution is basically the point at which the two intersect.

You can also graph the two equations, in which you would just simply look at where they intersect and that's your solution.

shamim · Answer

u can add ur 2 equations
u will get the value of x

mertsj · Answer

Add the two equations.  That will eliminate y and then you can solve for x.

anonymous · Answer

Or you could also do that ^^ It's math, so there's always typically more than one way to solve :P

anonymous · Answer

It just depends on what you prefer, I suppose.

mertsj · Answer

Normally one tries to evaluate the system to see which method is easier.

anonymous · Answer

True :) But it's always good to learn all possibilities.

anonymous · Answer

Can anyone help me graph it?

anonymous · Answer

@RPguy @Mertsj

magbak · Answer

Their is a very easy way to do it.

magbak · Answer

All you have to do is impute 0 for y and solve for x. After you solve for x just impute the value for x into the equation and solve for y. Then that is the answer.