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Stiind ca x-2*y+13=52,determinati 3* x-6*y+1

Răspuns :

[tex]x-2y+13=52 \Rightarrow x-2y=52-13 \Rightarrow x-2y=39 \\ 3x-6y+1=3(x-2y)+1=3 \cdot 39+1=117+1=118 \\ \boxed{3x-6y+1=118}[/tex]
x-2y=52-13
x-2y=39/*3
3x-6y=117
3x-6y+1=118
Castigator??