Ответ:
3,6•7,8+0,2•у=85,4
28.08+0.2y=85.4
0.2y=85.4 - 28.08
0.2y=57.32
y=57.32 : 0.2
y=286.6
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Ответ:
3,6•7,8+0,2•у=85,4
28.08+0.2y=85.4
0.2y=85.4 - 28.08
0.2y=57.32
y=57.32 : 0.2
y=286.6