Ответ

Автор - musician19
0,4х-1.2=2+0.5х-2.5
0.4х-0.5х=2-2.5+1.2
-0.1х=0.7
х=0.7:(-0.1)
х=-7

Ответ

Автор - kaban1998
0.4x-1.2=2+0.5x-2.5
-0.1x=0.7
x=-7

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