SOLUTION: -7x - 2y = -13 x - 2y = 11 ((Please show work! Just saying the answer will not help me learn, thank you.))

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Question 926674: -7x - 2y = -13
x - 2y = 11
((Please show work! Just saying the answer will not help me learn, thank you.))
Found 3 solutions by richwmiller, josgarithmetic, MathTherapy:
Answer by richwmiller(17219)   (Show Source): You can put this solution on YOUR website!
Since you talk about learning, tell me what you have tried?
What method will you use?
substitution or elimination?
matrices?
Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!


Solve one equation for one variable in terms of the other variable, and then substitute this into the other equation. Four different ways to go using the substitution method, if that is what you know so far.

From second equation, .
Simplifying First equation, .
Substitute for x into the first equation:



FINISH THIS ON YOUR OWN.
Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!

-7x - 2y = -13
x - 2y = 11
((Please show work! Just saying the answer will not help me learn, thank you.))


- 7x - 2y = - 13 ------ eq (i)

   x - 2y =   11 ------ eq (ii)

     - 8x = - 24 ------ Subtracting eq (ii) from eq (i)

Find x, then substitute that value in any of the above equations to determine y. Do you think you can do that? 

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