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Korvikt [17]
3 years ago
11

Can anyone help me solve this question

Mathematics
1 answer:
Law Incorporation [45]3 years ago
6 0

Answer:

(6, 3 )

Step-by-step explanation:

Given the 2 equations

5x - y = 27 → (1)

5x + 4y = 42 → (2)

Multiplying (1) by - 1 and adding to (2) will eliminate the x- term, that is

- 5x + y = - 27 → (3)

Add (2) and (3) term by term to eliminate the x- term

5y = 15 ( divide both sides by 5 )

y = 3

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

Substituting into (2)

5x + 4(3) = 42

5x + 12 = 42 ( subtract 12 from both sides )

5x = 30 ( divide both sides by 5 )

x = 6

Solution is (6, 3 )

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