Ta có : 4,5 - 2x * 147 = 11/14 .
⇒ 9/2 - 2x * 147 = 11/14 .
⇒ 2x * 147 = 9/2 - 11/14 .
⇒ 2x * 147 = 63/14 - 11/14 .
⇒ 2x * 147 = 26/7 .
⇒ 2x = 26/7 : 147 .
⇒ 2x = ( 26 * 147 ) / 7 .
⇒ 2x = 78 .
⇒ x = 78 : 2 .
⇒ x = 39 .
Vậy x = 39 .
\(4,5-2x\cdot147=\dfrac{11}{14}\\ 2x\cdot147=4,5-\dfrac{11}{14}\\ 2x\cdot147=\dfrac{52}{14}\\ 2x=\dfrac{52}{14}:147\\ 2x=\dfrac{26}{1029}\\ x=\dfrac{26}{1029}:2\\ x=\dfrac{13}{1029}\\ Vậy...\)
Tìm x:
a) 4,5 - 2x . 147 =1114
b) (x+ 14 −13 ): (2+16 −14 )=746
c)\(\dfrac{13}{15}-\left(\dfrac{13}{21}+x\right).\dfrac{7}{12}=\dfrac{7}{10}\)
Tìm x thuộc N,biết:
\(\dfrac{1}{2}\)+\(\dfrac{1}{3}\)+\(\dfrac{1}{6}\)< bằng x < bằng \(\dfrac{13}{4}\)+\(\dfrac{14}{8}\)
Tìm số tự nhiên lớn nhất n biết n + 5 ÷ n - 3
A. 14 B. 13 C. 12 D. 11
-2021/2022 . 3/14 - 2021/2011 . 11/14 + 2021/2022
-2021/2022 . 3/14 - 2021/2011 . 11/14 + 2021/2022
1.Tính:(-147).13+(-13).(-47)
2.Tìm X:-3.(x-2)3=81
MAi mk đi thi rùi,giúp nha
Mn giúp mk vs
a) (x-3) (y+5) =13
b) (8-2x) (11-5y)
c) ( 3x - 1 ) ( y+2) = 16
d) x-3 = y (x-1)
Cảm ơn mn nhiều
Tìm x thuộc Z:biết:
a/ \(\dfrac{x+2}{27}\)=\(\dfrac{x}{-9}\)
b/\(\dfrac{-7}{x}\)=\(\dfrac{21}{34-x}\)
c/\(\dfrac{-8}{15}\)<\(\dfrac{x}{40}\)<\(\dfrac{-7}{15}\)
d/\(\dfrac{-1}{2}\)<\(\dfrac{x}{18}\)<\(-\dfrac{1}{3}\)
a.11-12+13-14+15-16+17-18+19-20
b.101-102-(-103)-104-(-105)-106-(-107)-108-(-109)-110
