Ответ:
-1.7y - 3.5y=42.4+20
-5.2y=62.4
y=62.4 : (-5.2)
y= - 12
у = -12
.................
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Ответ:
-1.7y - 3.5y=42.4+20
-5.2y=62.4
y=62.4 : (-5.2)
y= - 12
у = -12
.................