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photoshop1234 [79]
3 years ago
5

What is the solution of the system? {5x−y=−21 {x+y=−3

Mathematics
2 answers:
Mekhanik [1.2K]3 years ago
7 0
X+y=-3 answer: x=-3+-1y
love history [14]3 years ago
5 0

Answer:

(-4,1)

Step-by-step explanation:

I just took the quiz. Hope this helps!

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\bf \begin{array}{lllll}&#10;&x_1&y_1&x_2&y_2\\&#10;%   (a,b)&#10;A&({{ a}}\quad ,&{{ 3}})\quad &#10;%   (c,d)&#10;B&({{ 2}}\quad ,&{{ -3}})&#10;\end{array}&#10;\\\\\\&#10;% slope  = m&#10;slope = {{ m}}= \cfrac{rise}{run} \implies &#10;\cfrac{{{ y_2}}-{{ y_1}}}{{{ x_2}}-{{ x_1}}}\implies \cfrac{-3-3}{2-a}=\boxed{-2}&#10;\\\\\\&#10;\cfrac{-6}{2-a}=-2\implies -6=-4+2a\implies -2=2a\implies \cfrac{-2}{2}=a&#10;\\\\\\&#10;-1=a
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Step-by-step explanation:

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