a, 1,5+1 1/4x=2/3
b,(x – 5) -1/3= 2/5
c,(4,5 – 2x) : 3/4= 1 1/3
d,(2,7x – 1 1/2x) :2/7= -21/4
Tim x nha
a, 1,5+1 1/4x=2/3 b,(x – 5) -1/3= 2/5 c,(4,5 – 2x) : 3/4= 1 1/3 d,(2,7x – 1 1/2x) :2/7= -21/4 Tim x nha
By Camila
By Camila
a, 1,5+1 1/4x=2/3
b,(x – 5) -1/3= 2/5
c,(4,5 – 2x) : 3/4= 1 1/3
d,(2,7x – 1 1/2x) :2/7= -21/4
Tim x nha
a) 1,5 + 1$\frac{1}{4}$x = 2/3
1$\frac{1}{4}$x = 2/3 – 1,5
5/4x = -5/6
x = -5/6 : 5/4
x = -2/3
Vậy x = -2/3
b) (x – 5) – 1/3 = 2/5
x – 5 = 2/5 + 1/3
x – 5 = 11/15
x = 11/15 + 5
x = 86/15
Vậy x = 86/15
c) (4,5 – 2x) : 3/4 = 1$\frac{1}{3}$
(4,5 – 2x) : 3/4 = 4/3
4,5 – 2x = 4/3 x 3/4
4,5 – 2x = 1
2x = 4,5 – 1
2x = 3,5
x = 3,5 : 2
x = 1,75
Vậy x = 1,75
d) (2,7x – 1$\frac{1}{2}$x) : 2/7 = -21/4
2,7 – 3/2x = -21/4 x 2/7
2,7 – 3/2x = -3/2
3/2x = 2,7 – (-3/2)
3/2x = 25/14
x = 25/14 : 3/2
x = 25/21
Vậy x = 25/21