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Leya [2.2K]
3 years ago
12

Which is the solution to the system 3x+y=8 and 7x−4y=25

Mathematics
1 answer:
tatyana61 [14]3 years ago
7 0

Answer:

(3, - 1 )

Step-by-step explanation:

Given the 2 equations

3x + y = 8 → (1)

7x - 4y = 25 → (2)

Multiplying (1) by 4 and adding to (2) will eliminate the y- term

12x + 4y = 32 → (3)

Add (2) and (3)  term by term to eliminate y

19x + 0 = 57

19x = 57 ( divide both sides by 19 )

x = 3

Substitute x = 3 into either of the 2 equations and solve for y

Substituting into (1)

3(3) + y = 8

9 + y = 8 ( subtract 9 from both sides )

y = - 1

solution is (3, - 1 )

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Alex787 [66]
Hey there!

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3 years ago
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lana [24]

Answer:

x = -1 and y = 18

Step-by-step explanation:

Given the system of equations

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y = 18

therefore your answer is  x = -1 and y = 18

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3 years ago
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3 years ago
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Damm [24]

Answer:

A tire reads P245/ 65R16 . What is the diameter and circumference in inches?

Step-by-step explanation:

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Answer:

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