2/5+3/5:(3/5+-2/3)-3-1/2
=2/5+3/5:(9/15+-10/15)-3-1/2
=2/5+3/5:(-1)/15-3-1/2
=2/5+3/5.15/(-1)-3-1/2
=2/5+(-9)-3-1/2
=(2/5-1/2)+(-9-3)
=(4/10-5/10)+(-12)
=-1/10-12
=-1/10-120/10
=(-121)/10
Thực hiện phép tính:
a, 5/17 + -5/34 . 2/5
b, 1/2 . 5/6 + 2/3 . 3/4
c, ( -2/5 + 1/3 ) . ( 3/2 - 3/7 )
Thực hiện phép tính:
a, 5/17 + -5/34 . 2/5
b, 1/2 . 5/6 + 2/3 . 3/4
c, ( -2/5 + 1/3 ) . ( 3/2 - 3/7 )
d, ( 1+ 1/2 ) . ( 1+ 1/3 ) . ( 1+ 1/4 )
Thực hiện phép tính:
a, 5/17 + -5/34 . 2/5
b, 1/2 . 5/6 + 2/3 . 3/4
c, ( -2/5 + 1/3 ) . ( 3/2 - 3/7 )
d, ( 1+ 1/2 ) . ( 1+ 1/3 ) . ( 1+ 1/4 )
Thực hiện phép tính:
a, 5/17 + -5/34 . 2/5
b, 1/2 . 5/6 + 2/3 . 3/4
c, ( -2/5 + 1/3 ) . ( 3/2 - 3/7 )
d, ( 1+ 1/2 ) . ( 1+ 1/3 ) . ( 1+ 1/4 )
Tìm x
p,-5 (x + 1/5 ) - 1/2( x - 2/3 ) = 3/2x - 5/6
q, 3(x - 1/2 ) - 5(x + 3/5 ) = -x+1/5
m, 3(3x - 1/2 )3 + 1/9 = 0
giúp mk với nhaaaaaaaaaaa
bài 1 : tìm x, biết:
A) X/3 - 1/2 = 1/5 B) x/5 + 1/2 = 6/10 c) x +3 /15 = 1/3 d) x -14/4 =1/4
đ) 1/2 x + 1/2 =5/2 n) -2/3 1/3 ( 2x -5 )=3/2 i) ( 3x -1) ( -1/2 x +5 ) =0 j) x-2/4 = 5+x/3
q) 3/x + 5 = 15% p) | x - 1/3 =5/6 m) 2| 1/2 x - 1/3 | - 3/2 = 1/4
z) ( 4,5 - 2 x) . ( -11/7) = 11/14 y) ( x/7 + 0,25 ) = -1/28
giup minh nhé
mai nộp rồi
cam ơn bạn rất nhiều
tick cho bạn nào đầu tiên
-5.(x+1/5)-1/2(x-2/3)=3/2.x-5/6
tìm x biết:...........giúp mk vs
a. x/5+1/2=6/10
b. x+3/15=1/3
c. x-12/4=1/2
d. 1/2x+1/2=5/2
e.-2/3-1/3(2x-5)=3/2
f. (3x-1)(-1/2x+5)=0
g. 1/2-2/3x=7/12
h. 3/4x+1/5=1/6
i. 17/12-|2x-3/4|=-7/4
x.3 1/4+(-7/6).x-1 2/3=5/12
5 8/17:x+(-4/17):x+3 1/7:17 1/3=4/11
-1 5/27-(3x-7/9)^3=-24/27
3(x-1/2)-5(x+3/5)=-x+1/5
