Toán 2(x-5)-17=25 24+3(.5-x)=27 15+42:x=17 Giúp minh đi 27/07/2021 By Eloise 2(x-5)-17=25 24+3(.5-x)=27 15+42:x=17 Giúp minh đi
`2 (x-5) -17 = 25` ` => 2x -10 – 17 = 25` ` => 2x – 27 = 25` ` => 2x = 52` ` => x= 52 : 2 = 26` Vậy ` x = 26` ********** ` 24 + 3(5 – x) = 27` ` => 3(5-x) = 27 – 24= 3` ` => 5 – x = 1` ` => x = 5- 1 = 4` Vậy ` x= 6` ********** ` 15 +42 : x = 17` ` => 42 : x = 15 – 17 = -2` ` => x= 42: (-2) ` ` => x= -21` Vậy ` x = -21` Trả lời
`a,2(x-5)-17=25` `⇔2(x-5)=42` `⇔x-5=21` `⇔x=26` $\text{Vậy x=26}$ `b,24+3(5-x)=27` `⇔3(5-x)=3` `⇔5-x=1` `⇔x=4` $\text{Vậy x=4}$ `c,15+42:x=17` `⇔42:x=2` `⇔x=21` $\text{Vậy x=21}$ Trả lời
`2 (x-5) -17 = 25`
` => 2x -10 – 17 = 25`
` => 2x – 27 = 25`
` => 2x = 52`
` => x= 52 : 2 = 26`
Vậy ` x = 26`
**********
` 24 + 3(5 – x) = 27`
` => 3(5-x) = 27 – 24= 3`
` => 5 – x = 1`
` => x = 5- 1 = 4`
Vậy ` x= 6`
**********
` 15 +42 : x = 17`
` => 42 : x = 15 – 17 = -2`
` => x= 42: (-2) `
` => x= -21`
Vậy ` x = -21`
`a,2(x-5)-17=25`
`⇔2(x-5)=42`
`⇔x-5=21`
`⇔x=26`
$\text{Vậy x=26}$
`b,24+3(5-x)=27`
`⇔3(5-x)=3`
`⇔5-x=1`
`⇔x=4`
$\text{Vậy x=4}$
`c,15+42:x=17`
`⇔42:x=2`
`⇔x=21`
$\text{Vậy x=21}$