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svlad2 [7]
3 years ago
5

Solve the system of linear equations by substitution. x=16−4y 3x+4y=8

Mathematics
1 answer:
Musya8 [376]3 years ago
7 0

Answer:

Solution: (-4,5)

Step-by-step explanation:

x=16-4y

3x+4y=8

-----

The 1st equation tells you x = 16-4y

---

Substitute that into the 2nd equation

and solve for "y":

3(16-4y)+4y = 8

48 - 12y + 4y = 8

-8y = -40

---

 

y = 5

---

Solve for "x"

x = 16-4y

x = 16-4*5

x = 16-20

x = -4

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