(х+2,1)*5=0,4*1,7
х+2,1=0,4*1,7/5
х+2,1=0,136
х=0,136-2,1
х=- 1,964
(5,1-3х)*6=9*2,3
(5,1-3х)*6=20,7
5,1-3х= 20,7/6
5,1-3х=3,45
-3х=3,45-5,1
-3х=-1,65
х=1,65/3
х=0,55
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(х+2,1)*5=0,4*1,7
х+2,1=0,4*1,7/5
х+2,1=0,136
х=0,136-2,1
х=- 1,964
(5,1-3х)*6=9*2,3
(5,1-3х)*6=20,7
5,1-3х= 20,7/6
5,1-3х=3,45
-3х=3,45-5,1
-3х=-1,65
х=1,65/3
х=0,55