X-12=0
x=12-0
x=12
25+X=25
X=25-25
X=0
x:108=1
x=108•1
x=108
y:1=37
y=37•1
y=37
x•15=0
x=0:15
x=0
x•18=18
x=18:18
х=1
<span>0,3(х-2)=0,2х+2
0,3х-0,6=0,2х+2
0,3х-0,2х=2+0,6
0,1х=2,6
з=2,6/0,1
х=26</span>
2 не смог решить
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