$40 – 22 + x = 11-13 $25 – 4 – 2 x = 13$ $13 +7 – 5x = 21 +18$ 21/11/2021 Bởi Abigail $40 – 22 + x = 11-13 $25 – 4 – 2 x = 13$ $13 +7 – 5x = 21 +18$
40 – 22 + x = 11 – 13 18 + x = -2 x = -2 – 18 x = -20 Vậy x = -20 25 – 4 – 2x = 13 21 – 2x = 13 2x = 21 – 13 2x = 8 x = 8 : 2 x = 4 Vậy x = 4 13 + 7 – 5x = 21 + 18 20 – 5x = 39 5x = 20 – 39 5x = -19 x = `-19/5` Vậy x = `-19/5` Bình luận
`40 – 22 + x = 11 – 13` `⇒18 + x= -2` `⇒ x= -2 – 18 ` `⇒x= -20` `25 – 4 – 2x = 13` `⇒21 – 2x= 13` `⇒2x= 21 – 13` `⇒2x= 8` `⇒x= 4` `13 + 7 – 5x = 21 + 18` `⇒20 – 5x= 39` `⇒5x= 20 – 39` `⇒5x= -19` `⇒x=-19/5` Bình luận
40 – 22 + x = 11 – 13
18 + x = -2
x = -2 – 18
x = -20
Vậy x = -20
25 – 4 – 2x = 13
21 – 2x = 13
2x = 21 – 13
2x = 8
x = 8 : 2
x = 4
Vậy x = 4
13 + 7 – 5x = 21 + 18
20 – 5x = 39
5x = 20 – 39
5x = -19
x = `-19/5`
Vậy x = `-19/5`
`40 – 22 + x = 11 – 13`
`⇒18 + x= -2`
`⇒ x= -2 – 18 `
`⇒x= -20`
`25 – 4 – 2x = 13`
`⇒21 – 2x= 13`
`⇒2x= 21 – 13`
`⇒2x= 8`
`⇒x= 4`
`13 + 7 – 5x = 21 + 18`
`⇒20 – 5x= 39`
`⇒5x= 20 – 39`
`⇒5x= -19`
`⇒x=-19/5`