Ta có X x 2/5 + X x17/10=1113/10
X x ( 2/5 + 17/10) = 1113/10
X x 21/10 = 1113/10
X = 1113/10 : 21/10
X = 53
Ta có X x 2/5 + X x17/10=1113/10
X x ( 2/5 + 17/10) = 1113/10
X x 21/10 = 1113/10
X = 1113/10 : 21/10
X = 53
Ta có X x 2/5 + X x17/10=1113/10
X x ( 2/5 + 17/10) = 1113/10
X x 21/10 = 1113/10
X = 1113/10 : 21/10
X = 53
Ta có X x 2/5 + X x17/10=1113/10
X x ( 2/5 + 17/10) = 1113/10
X x 21/10 = 1113/10
X = 1113/10 : 21/10
X = 53
Tim x
x+15,7=7,2x2,5
x x9,1+x x1,9=26,4
x : 12,5=48-45,66
x x9,9+x:10=12,5
tim x
[ 61+(53-x)]x17=1785
158,65-63,75:17=
65,2:10-67,2x0,1=
tim x
xx35=164-83,5
[7,5x10-650x0,1]xx=8,4
bài 1 thực hiện phép tính
( 4/5 + 3/10- 1/5 ) x6 :4/7
2007x 76 - 75 x 2007 - 2007
( 47,5 +8,6x 4,5 - 105)
bài 2 tìm x
a) x: 2/5 = 10
75% +30% x =4
( 9 xX + 2)x 3 -47=13
Tìm X
A) X+ 1/4= 5/8
B) X-3/5= 1/10
C) Xx 2/7= 6/11
D) X:3/2 = 1/4
tim x biet
2/3 chia x/5 cong 5/7 bang 2/7 chia 3/5 cong 9/10
Tìm X biết 1/3+1/6+1/10+...+2/Xx(X x 2)=1999/2001
tim x
A ; x:5\4 =9\5 +1\2
B;[x+3\4]*5\7=10\9
Tim x:
X-1va4/5=10/5
5.85:x=26-25.5
151--2*(x-6) =2227:17
2/3-1/3*x=1/4