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For questions 9–10, solve each system by elimination.

9. 5x + 4y = 1

3x – 4y = 7 (1 point)
(–1, –1)
(1, –1)
(1, 1)

10. x + 2y = 5

3x + y = 10 (1 point)
(3, –1)
(1, 3)
(3, 1)

2 answers

9.
5x + 4y = 1
3x ? 4y = 7

what does ? mean ?

5x+4y=1
3x+4y=-7

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