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lbvjy [14]
2 years ago
10

WRITING Explain how to solve the system of linear equations

Mathematics
1 answer:
Keith_Richards [23]2 years ago
3 0

Step-by-step explanation:

2x - 3y =  - 4.....(1) \\  - 5x + 9y = 7.....(2) \\ \\(1) \times 5 \\ 10x - 15y =  - 20.....(3) \\ (2) \times 2 \\  - 10x + 18y = 14.....(4) \\  \\ (3) + (4) \\ 10x - 15y - 10x + 18y =  - 20 + 14 \\ 3y =  - 6 \\ y =  - 2 \\  \\ (1) \\ 2x - 3 \times ( - 2) =  - 4 \\ 2x + 6 =  - 4 \\ 2x =  - 10 \\ x =  \frac{ - 10}{2}  \\ x =  - 5

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