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30 votes
30 votes
Solve system by elimination -9x - y =-19
5x + y = 15

User Leonardo Nomdedeu
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3.1k points

1 Answer

7 votes
7 votes

Answer:

(1, 10 )

Explanation:

Given the 2 equations

- 9x - y = - 19 → (1)

5x + y = 15 → (2)

Adding the 2 equations term by term will eliminate the y- term

- 4x + 0 = - 4

- 4x = - 4 ( divide both sides by - 4 )

x = 1

Substitute x = 1 into either of the 2 equations and solve for y

Substituting into (2)

5(1) + y = 15

5 + y = 15 ( subtract 5 from both sides )

y = 10

solution is (1, 10 )

User David Weinberg
by
2.7k points