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KiRa [710]
2 years ago
12

X - y = -2 7x + 2y = -5 Élimination method

Mathematics
1 answer:
gladu [14]2 years ago
5 0

Answer:

x = -1, y = 1

Step-by-step 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

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4 years ago
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