Toán Bài 1: A). (x-31)x15=0 B). 15/x = 2/12 Các bạn giúp mình nhé 17/08/2021 By Maya Bài 1: A). (x-31)x15=0 B). 15/x = 2/12 Các bạn giúp mình nhé
@Bơ `(x-31).15=0` `x-31=0:15` `x-31=0` `x=0+31` `x=31` Vậy `x=31` `15/x = 2/12` `=>x.2=15.12` `x.2=180` `x=180:2` `x=90` Vậy `x=90` Trả lời
$\text{a. (x – 31) × 15 = 0}$ $\text{x – 31 = 0 : 15}$ $\text{x – 31 = 0}$ $\text{⇒ x = 31}$ $\text{b. $\dfrac{15}{x}$ = $\dfrac{2}{12}$}$ $\text{x . 2 = 15 . 12}$ $\text{x . 2 = 180}$ $\text{⇒ x = 90}$ Trả lời
@Bơ
`(x-31).15=0`
`x-31=0:15`
`x-31=0`
`x=0+31`
`x=31`
Vậy `x=31`
`15/x = 2/12`
`=>x.2=15.12`
`x.2=180`
`x=180:2`
`x=90`
Vậy `x=90`
$\text{a. (x – 31) × 15 = 0}$
$\text{x – 31 = 0 : 15}$
$\text{x – 31 = 0}$
$\text{⇒ x = 31}$
$\text{b. $\dfrac{15}{x}$ = $\dfrac{2}{12}$}$
$\text{x . 2 = 15 . 12}$
$\text{x . 2 = 180}$
$\text{⇒ x = 90}$