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5+2(2x+1)=5(x-1) sa se afle x


Răspuns :

5+4x+2=5x-5
12=5x-4x
x=12

[tex]5+2(2x+1)=5(x-1) \\ 5+4x+2=5x-5 \\ 7+4x=5x-5 \\ Il~trecem~pe~4x~in~dreapta~cu~semn~schimbat,~la~fel~si~pe~-5: \\ \boxed{x=12}[/tex]