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CompletatiȘ 5x-7=2x+1<=> ? x= ?

Răspuns :

Trecem x in partea stanga , numerele in dreapta si obtinem 5x-2x=7+1
Rezolvand, 3x=8=>x=8/3
[tex]5x-7=2x+1 \\ 5x-7+7=2x+1+7 \\ 5x=2x+8 \\ 5x-2x=2x+8-2x \\ 3x=8 \\ \frac{3x}{3}=\frac{8}{3} \\ x=\frac{8}{3}[/tex]