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Klio2033 [76]
3 years ago
7

What’s is the answer to y=3x+7 Y=x-9

Mathematics
1 answer:
photoshop1234 [79]3 years ago
6 0

Answer:

(- 8, - 17 )

Step-by-step explanation:

Given the 2 equations

y = 3x + 7 → (1)

y = x - 9 → (2)

Substitute y = 3x + 7 into (2)

3x + 7 = x - 9 ( subtract x from both sides )

2x + 7 = - 9 ( subtract 7 from both sides )

2x = - 16 ( divide both sides by 2 )

x = - 8

Substitute x = - 8 into either of the 2 equations for corresponding value of y

Substituting into (2)

y = - 8 - 9 = - 17

Solution is (- 8, - 17 )

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