184k views
25 votes
X - y = -2 7x + 2y = -5

Élimination method

X - y = -2 7x + 2y = -5 Élimination method-example-1
User Jonatzin
by
8.5k points

1 Answer

2 votes

Answer:

x = -1, y = 1

Explanation:

Multiply the top equation by 2:


2x - 2y = - 4

Leaving the bottom equation unchanged, add the two resulting equations to eliminate y, obtaining:


9x = - 9

Solve this for x, and then substitute this value of x into the bottom equation. Finally, solve for y.


x = - 1


7( - 1) + 2y = - 5


- 7 + 2y = - 5


2y = 2


y = 1

User Cabita
by
8.2k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories