-х+3,12=-9,003
-х=-9,003-3,12
-х=-12,123
х=12,123
-1х+3,12=-9,003
-1х=-9,003-3,12
-1х=-12,123
х=-12,123/(-1)
-х+3,12=-9,003
-х=-9,003-3,12
-х=-12,123
х=12,123
-1х+3,12=-9,003
-1х=-9,003-3,12
-1х=-12,123
х=-12,123/(-1)
х=12,123