х+(х+4)+((х+4)*2)=40
х+х+4+2х+8=40
2х+2х=-8-4+40
4х=28
х=28:4
х=7
Ответ: х= 7
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х+(х+4)+((х+4)*2)=40
х+х+4+2х+8=40
2х+2х=-8-4+40
4х=28
х=28:4
х=7
Ответ: х= 7