Toán ) (x – 3) : 2 = 514 : 512 b) 4x + 3x = 30 – 20 : 10 17/07/2021 By Jasmine ) (x – 3) : 2 = 514 : 512 b) 4x + 3x = 30 – 20 : 10
ĐÁP ÁN : a)` (x – 3) : 2 = 514 : 512` `(x – 3) : 2 =514/512` `x – 3 = 541/512 . 2` `x – 3 = 2,0078125` b) `4x + 3x = 30 – 20 : 10` `7x = 30 – 2` `7x = 28` `x = 28/7 ` `x = 4 ` #NOCOPY Trả lời
(x – 3 ) : 2 = 514 : 512 ( x – 3 ) : 2 = $\frac{63}{64}$ x – 3 = $\frac{63}{64}$ . 2 x – 3 = $\frac{63}{32}$ x = $\frac{63}{32}$ + 3 x = $\frac{159}{32}$ 4x + 3x = 30 – 20 : 10 7x = 30 – 2 7x = 28 x = 28 :7 x = 4 Trả lời
ĐÁP ÁN :
a)` (x – 3) : 2 = 514 : 512`
`(x – 3) : 2 =514/512`
`x – 3 = 541/512 . 2`
`x – 3 = 2,0078125`
b) `4x + 3x = 30 – 20 : 10`
`7x = 30 – 2`
`7x = 28`
`x = 28/7 `
`x = 4 `
#NOCOPY
(x – 3 ) : 2 = 514 : 512
( x – 3 ) : 2 = $\frac{63}{64}$
x – 3 = $\frac{63}{64}$ . 2
x – 3 = $\frac{63}{32}$
x = $\frac{63}{32}$ + 3
x = $\frac{159}{32}$
4x + 3x = 30 – 20 : 10
7x = 30 – 2
7x = 28
x = 28 :7
x = 4