Explicaê

01

(ESCOLA NAVAL) As retas r1: 2x – y + 1 = 0; r2 : x + y + 3 = 0 e r3 : ᵅx + y – 5 = 0 concorrem em um mesmo ponto P para determinado valor de ᵅ € R. Sendo assim, pode-se afirmar que o valor da expressão  é:

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