2x+5y=6,中y=3,则x等于?

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2x+5y=6,中y=3,则x等于?2x+5y=6,中y=3,则x等于?2x+5y=6,中y=3,则x等于?-4.5

2x+5y=6,中y=3,则x等于?
2x+5y=6,中y=3,则x等于?

2x+5y=6,中y=3,则x等于?
-4.5