giúp lm 2 câu này vs: a, x . 3 – 2018 : 2 = 23 b, 280 – x . 9 – x = 80 19/07/2021 Bởi Ayla giúp lm 2 câu này vs: a, x . 3 – 2018 : 2 = 23 b, 280 – x . 9 – x = 80
`a, x . 3 – 2018 : 2 = 23` `x . 3 – 1009 = 23` `x . 3 = 23 + 1009` `x . 3 = 1032` `x = 1032 : 3` `x = 344` `b, 280 – x . 9 – x = 80` `-9x – x = 80 – 280` `-10x = -200` `x = -200 : ( -10 )` `x = 20.` Bình luận
a, x . 3 – 2018 : 2 = 23 x . 3 – 1009 = 23 x . 3 = 23 + 1009 x . 3 = 1032 x = 1032 : 3 x = 344 b, 280 – x . 9 – x = 80 – 9x – x = 80 – 280 – 10x = – 200 x = – 200 : ( – 10 ) x = 20 Bình luận
`a, x . 3 – 2018 : 2 = 23`
`x . 3 – 1009 = 23`
`x . 3 = 23 + 1009`
`x . 3 = 1032`
`x = 1032 : 3`
`x = 344`
`b, 280 – x . 9 – x = 80`
`-9x – x = 80 – 280`
`-10x = -200`
`x = -200 : ( -10 )`
`x = 20.`
a, x . 3 – 2018 : 2 = 23
x . 3 – 1009 = 23
x . 3 = 23 + 1009
x . 3 = 1032
x = 1032 : 3
x = 344
b, 280 – x . 9 – x = 80
– 9x – x = 80 – 280
– 10x = – 200
x = – 200 : ( – 10 )
x = 20