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Hey, so this one says What do the following
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order? Paris have a system of equations above?
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Well, if we have assistance of equations, that
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means that we have to solve it by combining them
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. Once we combine them, we can isolate the
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X and the Y. So in order to do
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that, I'm going to go ahead and multiply.
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This choppy question by two is if I'm not by
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the entire thing by two, and I get two
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X Plus two y is equal to zero. And
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then now it allows me to add the two equations
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if I have to expose to eyes equal to zero
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and three X minus two, eyes equal to ten
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. If I add them, then you can notice
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that this positive line the negative to whack and cancel
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out. So then to expose three Axis five x
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on this Europe list Tennis ten. So then,
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finally, to isolate our ex, I'm just going
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to subtract or divide both sides by five. Leaving
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me with the X is equal to two, so
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from there, we already know that are correct.
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Answer has to be because that's the only one with
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a two positive to as our ex Cordant. But
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let's go and try playing it back into the original
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just to make sure. So if I do that
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, I get to plus some, why is equal
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to zero and that three terms to minus some?
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Why is equal to ten? Well, for this
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one, if we subtract two from both sides,
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we get that Y is equal to negative twos.
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That one works for the bottom one. We have
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six minus two. Y is equal to ten,
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and then if we plug in a negative to their
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six minus two times, negative, too, is
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, in fact equal to turn, so we know
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that B works.