Solve for x and y: Calculating Equations with Unknown Variables

  • Thread starter rabihtawil
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In summary, the conversation discusses solving a system of linear equations in two variables, with the solution being x = -3 and y = 3. The process involves using matrices and an augmented matrix to represent the equations. The person asking for help initially struggled with solving the equations but eventually figured it out.
  • #1
rabihtawil
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Homework Statement



i have the answer for this i just don't know how it happened
Issue1:
2x+y+3=0
x= -3

Issue2:
x+2y-3=0
y=3

Homework Equations



How did they come up with this solution?

The Attempt at a Solution



I reread it & try to solve it no luck :(
 
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  • #2
oh never mind i figured it out, it's a system of linear equation

2 1 3
1 2 -3

solve the system the above results will come up. thank you forum
 
  • #3
You know how to solve matrices but not a system of 2 linear equations in 2 variables?
You have essentially started with the harder stuff and skipped the easier ones :bugeye:
 
  • #4
My math skills are bad, I'm just working hard to pass these classes because I'm a computer science student. i finished all my major except 3 math courses which i am having the worst experience of my life in.
 
  • #5
rabihtawil said:
oh never mind i figured it out, it's a system of linear equation

2 1 3
1 2 -3

solve the system the above results will come up. thank you forum
If you're working with an augment matix, it should be
Code:
[2 1 | -3]
[1 2 | 3]

The rows in this matrix come from these equations:
2x + y = -3
x + 2y = 3
 

FAQ: Solve for x and y: Calculating Equations with Unknown Variables

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