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irina1246 [14]
3 years ago
15

How to do these problems

Mathematics
1 answer:
topjm [15]3 years ago
5 0
\bf \begin{array}{llcll}
3x-y=7&&3x-y=7\\
x+y=-11&\boxed{\times -3}\implies &-3x-3y=33\\
&&-------\\
&&0-4y=40
\end{array}\\\\
y=\cfrac{40}{-4}\implies y=-10\\\\
-----------------------------\\\\

\begin{array}{cllll}
x-7y=-9\\
-x+8y=10\\
--------\\
0+y=1
\end{array}\\\\
-----------------------------\\\\

\begin{array}{llcll}
7x+y=14&\boxed{\times -3}\implies &-21x-3y=-42\\
8x+3y=16&&8x+3y=16\\
&&--------\\
&&-13x+0=-26
\end{array}
\\\\
x=\cfrac{-26}{-13}\implies x=2

notice, the 2nd one, had a x and -x, so, we don't have to multiply anything there, just cancel those two out
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The phenomena of hiding distribution characteristics in a system from applications and users is known as distribution transparency. Access transparency, location transparency are some examples.

<h3>Define the term (distribution) transparency?</h3>

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1 year ago
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trapecia [35]

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Natasha2012 [34]
2x+8=20
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6=x
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2 years ago
Read 2 more answers
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