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ziro4ka [17]
3 years ago
8

System of equations.

Mathematics
1 answer:
Molodets [167]3 years ago
7 0

Answer:

(- 1, 2 )

Step-by-step explanation:

Given the 2 equations

2x + 5y = 8 → (1)

- x + 3y = 7 → (2)

Multiplying (2) by 2 and adding to (1) will eliminate the term in x, thus

- 2x + 6y = 14 → (3)

Add (1) and (3) term by term to eliminate the x- term

11y = 22 ( divide both sides by 11 )

y = 2

Substitute y = 2 in either of the 2 equations and evaluate for x

Substituting in (1)

2x + 5(2) = 8

2x + 10 = 8 ( subtract 10 from both sides )

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

x = - 1

Solution is (- 1, 2 )

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3 years ago
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Answers + Explanation:

1. x + 7 =10

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the other way you can solve this would be:

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3 years ago
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Step-by-step explanation:

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