Răspuns :
Deci, intai separam termenii, cei cu x in dreapta, dupa egal si termenii liberi(9) in stanga egalului. Putem incepe prin a scadea 2x
avem: 9=3x-2x
9=x , sper ca ai inteles :*
avem: 9=3x-2x
9=x , sper ca ai inteles :*
[tex] \it 2x+9=3x \Leftrightarrow 9=3x-2x \Leftrightarrow 9= x\Leftrightarrow x=9[/tex]
[tex]\it 2x+9=3x \Leftrightarrow 2x-3x =-9 \Leftrightarrow -x=-9|_{\cdot (-1)} \Leftrightarrow x=9[/tex]
[tex]\it 2x+9=3x \Leftrightarrow 2x-3x =-9 \Leftrightarrow -x=-9|_{\cdot (-1)} \Leftrightarrow x=9[/tex]