Решите систему уравнений 2x - y = 5, 7x + 3y = 11

Question

Решите систему уравнений 2x - y = 5, 7x + 3y = 11

Answer 1

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Answer 2

2X - 5 = Y 
7X + 3 * ( 2X - 5) = 11 
7X + 6X - 15 = 11 
13X = 26 
X = 2 
Y = 4 - 5 = - 1