Question

x+y=3
x-y=1
Pls resolvati asta




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Answer 1

Răspuns:

x-y=1 x=y+1

y+1+y=3 => y=1 x=2

Answer 2

Răspuns:

Explicație pas cu pas:

{x+y=3

{x-y=1

______

2x = 4 => x = 4:2 => x = 2

y = x-1 = 2-1 => y = 1