Tìm x
g, 3/8 – 1/6 : x = 1/4
h, 3/4 . x + 1/3 = 1/6
i, 1/3 + 1/2 : x = -4
k, x – 1/5 = 2/7 . -11/5
l, ( 2x – 3 ) + 1/5 = 4/3 – 3
Tìm x g, 3/8 – 1/6 : x = 1/4 h, 3/4 . x + 1/3 = 1/6 i, 1/3 + 1/2 : x = -4 k, x – 1/5 = 2/7 . -11/5 l, ( 2x – 3 ) + 1/5 = 4/3 – 3
By Lyla
g) $\frac{3}{8}$ – $\frac{1}{6}$ : x = $\frac{1}{4}$
=> $\frac{1}{6}$ : x = $\frac{3}{8}$ – $\frac{1}{4}$ = $\frac{1}{8}$
=> $x = \frac{1}{6} : \frac{1}{8} $
=> $x = \frac{4}{3}$
h) $\frac{3}{4}x + \frac{1}{3} = \frac{1}{6}$
=> $\frac{3}{4}x = \frac{-1}{6}$
=> $ x = \frac{-2}{9}$
i) $\frac{1}{3} + \frac{1}{2} : x = -4$
=> $\frac{1}{2} : x = \frac{-13}{3}$
$=> x = \frac{3}{26}$
k) x – $\frac{1}{5} = \frac{2}{7} . (- \frac{-11}{5})$
=> x – $\frac{1}{5} = \frac{-22}{35}$
=> $x = \frac{3}{7}$
i) $(2x-3) + \frac{1}{5} = \frac{4}{3} – 3$
=> $ 2x – 3+ \frac{1}{5} = \frac{-5}{3}$
=> $2x – \frac{-14}{5} = \frac{-5}{3}$
=> $2x = \frac{-67}{15}$
=> $x = \frac{-67}{30}$
@Team IQ vô cực
g, 3/8 – 1/6 : x = 1/4
1/6 : x = 3/8 – 1/4
1/6 : x = 1/8
x = 1/6 : 1/8
x = 1/6 x 8
x = 4/3
Vậy x = 4/3
h, 3/4.x + 1/3 = 1/6
3/4.x = 1/6 – 1/3
3/4.x = -1/6
x = -1/6 : 3/4
x = -1/6 x 4/3
x = -2/9
Vậy x = -2/9
i, 1/3 + 1/2 : x = -4
1/2 : x = 1/3 – (-4)
1/2 : x = 13/3
x = 1/2 : 13/3
x = 1/2 x 3/13
x = 3/26
Vậy x = 3/26
k, x – 1/5 = 2/7.(-11/5)
x – 1/5 = -22/35
x = -22/35 + 1/5
x = -3/7
Vậy x = -3/7
l, (2x – 3) + 1/5 = 4/3 – 3
2x – 3 = 4/3 – 3 – 1/5
2x – 3 = -28/15
2x = 17/15
x = 17/15 : 2
x = 17/30
Vậy x = 17/30