Odpowiedź :
[tex]3\cdot x+5+2\cdot x =19\\\\5x=19-5\\\\5x=14\ \ |:5\\\\x=\frac{14}{5}=2\frac{4}{5}[/tex]
[tex]12\cdot x -4-8 \cdot x=16 \\\\4x=16+4\\\\4x=20\ \ |:4\\\\x=5[/tex]
[tex]3\cdot x+5+x=33\\\\4x=33-5\\\\4x=28\ \ |:4\\\\x=7[/tex]
[tex]3\cdot x+5+2\cdot x =19\\\\5x=19-5\\\\5x=14\ \ |:5\\\\x=\frac{14}{5}=2\frac{4}{5}[/tex]
[tex]12\cdot x -4-8 \cdot x=16 \\\\4x=16+4\\\\4x=20\ \ |:4\\\\x=5[/tex]
[tex]3\cdot x+5+x=33\\\\4x=33-5\\\\4x=28\ \ |:4\\\\x=7[/tex]