Toán (3y+9)/(3y-1)+(2y-13)/(2y+5)=2 Giúp mik nha 22/07/2021 By Camila (3y+9)/(3y-1)+(2y-13)/(2y+5)=2 Giúp mik nha
`(3y+9)/(3y-1) + (2y-13)/(2y+5) = 2` `⇔ (3y+9)(2y+5) + (2y-13)(3y-1) = 2(3y-1)(2y+5)` `⇔ 12y^2 – 8y + 58 = 2(6y^2 + 13y – 5)` `⇔ 12y^2 – 8y = 12y^2 + 26y – 68` `⇔ -34y = -64` `⇔ y = 2` Vậy `y = 2` Trả lời
`(3y+9)/(3y-1) + (2y-13)/(2y+5) = 2`
`⇔ (3y+9)(2y+5) + (2y-13)(3y-1) = 2(3y-1)(2y+5)`
`⇔ 12y^2 – 8y + 58 = 2(6y^2 + 13y – 5)`
`⇔ 12y^2 – 8y = 12y^2 + 26y – 68`
`⇔ -34y = -64`
`⇔ y = 2`
Vậy `y = 2`
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