Răspuns :
[tex]10x - 4x - 4 = 20[/tex]
[tex]10x - 4x = 20 + 4[/tex]
[tex]6x = 24[/tex]
[tex]x = 24 \div 6[/tex]
[tex]x = 4[/tex]
[tex]10x - 4x = 20 + 4[/tex]
[tex]6x = 24[/tex]
[tex]x = 24 \div 6[/tex]
[tex]x = 4[/tex]