(y+9)+(y-8)+(y+7)+(y-6)+(y+5)+(y-4)=63.6 5 sao ạ 28/08/2021 Bởi Alaia (y+9)+(y-8)+(y+7)+(y-6)+(y+5)+(y-4)=63.6 5 sao ạ
`(y+9)+(y-8)+(y+7)+(y-6)+(y+5)+(y-4)=63,6` `y+9+y-8+y+7+y-6+y+5+y-4=63,6` `5y+1+1+1=63,6` `5y+3=63,6` `5y=63,6-3` `y=60,6:5` `y=12,12` Xin hay nhất ạ. Bình luận
⇒y+9+y-8+y+7+y-6+y+5+y-4=378
⇒6y+3=378
⇒6y=375
⇒y=375/6=125/2=62.5
`(y+9)+(y-8)+(y+7)+(y-6)+(y+5)+(y-4)=63,6`
`y+9+y-8+y+7+y-6+y+5+y-4=63,6`
`5y+1+1+1=63,6`
`5y+3=63,6`
`5y=63,6-3`
`y=60,6:5`
`y=12,12`
Xin hay nhất ạ.