$\frac{3x + 1}{15}$ + 1$\frac{2}{3}$ = $\frac{15x}{25}$ – 1 20/09/2021 Bởi Josie $\frac{3x + 1}{15}$ + 1$\frac{2}{3}$ = $\frac{15x}{25}$ – 1
`(3x+1)/15+1(2)/3=(15x)/25-1` `⇒(3x+1)/15+5/3=(3x)/5-1` `⇒(3x+1)/15+25/15=(9x)/15-(15)/(15)` `⇒3x+1+25=9x-15` `⇒9x-3x=15+1+25` `⇒6x=41` `⇒x=(41)/6` Vậy `x=41/6`. Bình luận
Đáp án : $\frac{3x +1}{15}$+1$\frac{2}{3}$ = $\frac{15x}{25}$ – 1 $\frac{3x +1}{15}$+ $\frac{5}{3}$ = $\frac{15x}{25}$ – 1 $\frac{15x +5}{75}$+ $\frac{125}{75}$ = $\frac{45x}{75}$ – $\frac{75}{75}$ 15x + 5 + 125 = 45x – 75 15x + 130 = 45x – 75 75 + 130 = 45x – 15x 205 = 30x ⇒ x = 205 : 30 = $\frac{41}{6}$ ~ chúc e hok tốt ~ Bình luận
`(3x+1)/15+1(2)/3=(15x)/25-1`
`⇒(3x+1)/15+5/3=(3x)/5-1`
`⇒(3x+1)/15+25/15=(9x)/15-(15)/(15)`
`⇒3x+1+25=9x-15`
`⇒9x-3x=15+1+25`
`⇒6x=41`
`⇒x=(41)/6`
Vậy `x=41/6`.
Đáp án :
$\frac{3x +1}{15}$+1$\frac{2}{3}$ = $\frac{15x}{25}$ – 1
$\frac{3x +1}{15}$+ $\frac{5}{3}$ = $\frac{15x}{25}$ – 1
$\frac{15x +5}{75}$+ $\frac{125}{75}$ = $\frac{45x}{75}$ – $\frac{75}{75}$
15x + 5 + 125 = 45x – 75
15x + 130 = 45x – 75
75 + 130 = 45x – 15x
205 = 30x
⇒ x = 205 : 30 = $\frac{41}{6}$
~ chúc e hok tốt ~