\(\dfrac{x}{5}=\dfrac{5}{6}-\left(-\dfrac{19}{30}\right)\\ =>\dfrac{x}{5}=\dfrac{5}{6}+\dfrac{19}{30}\\ =>\dfrac{x}{5}=\dfrac{25}{30}+\dfrac{19}{30}\\ =>\dfrac{x}{5}=\dfrac{44}{30}\\ =>\dfrac{x}{5}=\dfrac{22}{15}\\ =>15x=22.5\\ =>15x=110\\ =>x=110:15\\ =>x=\dfrac{22}{3}\)
x/5=5/6+-19/30
/: phần
Tìm x: 5/6+(-19)/30=x/5
\(\frac{x}{5}=\frac{5}{6}+\frac{-19}{30}\)
giúp mình với x=5/6+(-19)/30
Bài 4 :
a) \(\dfrac{x}{3}=\dfrac{2}{3}+\dfrac{-1}{7}\)
b) \(\dfrac{x}{5}=\dfrac{5}{6}+\dfrac{-19}{30}\)
tính nhanh b)(17/28+18.29+19/30+30/31)x(-5/12+1/4+1/6)
Tìm x, y
1. x-2/3 = -1/y
2. 9/x=2/5 + -7/20
x/5=5/6 + -19/30
tìm x.
a, x = 1/2 + 3/4
b, x/5 = 5/6 + -19/30
c, x = 1/11 + -3/22
d, x/5 = 3/5 + -5/4
