Question

x1 + 2x2 = -1
5x1 – 3x2 = 21

Answer 1

Olá Amauri

x1 + 2x2 = -1

5x1 - 3x2 = 21

3x1 + 6x2 = -3
10x1 - 6x2 = 42

13x1 = 39
x1 = 3

3 + 2x2 = -1
2x2 = -4
x2 = -2

S = (3, -2) 

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