Asked by Anonymous
                Solve using augmented matrices.
x + y = 1
3x – y = 7
Please help, I need a step-by-step explination. I dont understand it at all...
            
        x + y = 1
3x – y = 7
Please help, I need a step-by-step explination. I dont understand it at all...
Answers
                    Answered by
            Anonymous
            
    Please help, I really need help to even understand the subject. I am really lost... 
    
                    Answered by
            oobleck
            
    top: y = 1-x
so, use that in the bottom:
3x - (1-x) = 7
4x-1 = 7
x = 2
y = 1-x = -1
    
so, use that in the bottom:
3x - (1-x) = 7
4x-1 = 7
x = 2
y = 1-x = -1
                    Answered by
            @oobleck
            
    is that solving using augmented matrices?
    
                    Answered by
            oobleck
            
    no, that is substitution.
Looks like you need to review elimination and augmented matrices.
    
Looks like you need to review elimination and augmented matrices.
                    Answered by
            @oobleck
            
    I tried but I didn't understand it. I was saying that
    
                    Answered by
            @oobleck
            
    Your answer didn't help at all. I already know how to solve using elimination and substitution. But thanks anyway...
    
                                                    There are no AI answers yet. The ability to request AI answers is coming soon!
                                            
                Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.