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umka2103 [35]
3 years ago
7

12x=76-20y 8x=84-20y

Mathematics
1 answer:
levacccp [35]3 years ago
4 0

Answer:

<h2>x = -2, y = 5 → (-2, 5)</h2>

Step-by-step explanation:

\left\{\begin{array}{ccc}12x=76-20y&\text{change the signs}\\8x=84-20y\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}-12x=-76+20y\\8x=84-20y\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad-4x=8\qquad\text{divide both sides by (-4)}\\.\qquad x=-2\\\\\text{put the value of x to the second equation}\\\\8(-2)=84-20y\\-16=84-20y\qquad\text{subtract 84 from both sides}\\-100=-20y\qquad\text{divide both sides by (-20)}\\5=y\to y=5

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As given

If (-6,-38) and (5,28) are two anchor points on the trend line.

Than

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