x+2+x=9
2x=9-2
2x=7
x=3,5
(х+2)+х=9
2х+2=9
2х=9-2
2х=7
х= 7:2
х=3,5 или 7/2
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x+2+x=9
2x=9-2
2x=7
x=3,5
(х+2)+х=9
2х+2=9
2х=9-2
2х=7
х= 7:2
х=3,5 или 7/2