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Tanya [424]
3 years ago
8

What is the solution to the system of equations below?

Mathematics
1 answer:
sattari [20]3 years ago
7 0

Answer:

<h2>x = 9, y = -36 → (9, -36)</h2>

Step-by-step explanation:

y=-3x-9\qquad(1)\\\\y=\dfrac{1}{3}x-39\qquad(2)\\\\\text{Substitute (1) to (2)}\\\\-3x-9=\dfrac{1}{3}x-39\qquad\text{multiply both sides by 3}\\\\-9x-27=x-117\qquad\text{add 27 to both sides}\\\\-9x=x-90\qquad\text{subtract}\ x\ \text{from both sides}\\\\-10x=-90\qquad\text{divide both sides by (-10)}\\\\x=9

\text{Put the value of x to (1):}\\\\y=-3(9)-9\\\\y=-27-9\\\\y=-36

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