Question

5 ejemplos de reduccion de suma

Answer 1

1.) 5x + 3y = 13 (+)

9x - 3y = 15

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14x = 28

x = 2

2.) x + y = 12 (+)

2x - y = 9

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3x = 21

x = 7

3.) 8x - 7y = 10 (+)

x + 7y = 8

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9x = 18

x = 2