`a)5 xx x :3/4 =40/9`
`=>5 xx x = 40/9 xx 3/4`
`=>5xx x=10/3`
`=>x=10/3 : 5`
`=>x=10/3 xx 1/5`
`=>x=2/3`
`b)x/25 + 18/5 = 3 18/5`
`=>x : 25 + 18/5=33/5`
`=> x: 25=33/5-18/5`
`=>x:25=3`
`=>x=25/3`
Tìm x
A : 4/9 nhân x = 25/18 : 2/3
B: x chia 4/5 = 25/8 : 5/4
C: 22/5 : x = 44/5 : 5/2
5 x 18 x 4 / 3 x4 x 25
Tìm x
a, 49 - 7 x ( x - 18 ) = 21
b, 64 - ( 3 x . 27 ) : 2 = 40
c, ( x +3 ) + ( 4 x +5 ) = 48
d, ( x + 18 ) = 4x +42
a)1020+X.1/3=4/5+1020
b) X:2/3=25/1/2
c)5/4/9+X-7/7/18=15/3/4
8 x 75 x 3 + 6 x 25 x 4 - 240 / 15 x 2 x 6 + 18 x 16 x 5
a ] 4976+[x nhân 5]=1486
b] x : [25+417]=138
24 nhân 36+18 nhân 24+18 nhân 45 trù 18 nhân 7
1\3+1\9+1\27+1\81=
3\5<x<4\5 3,5 <x<3,6
ai nhanh mk sẽ tk kb luôn nhé
tìm x biết :
a> 15-10*(x-1)=5
b> (x+1)+(x+2)+(x+3)=18
c> 17+2*(x+2)=25
d> x:17+26=82-17
e> (117+30)*x=882:2
g> 11*(x:81) =330:10
i> (x+1)+(x+2)+(x+3)+(x+4)+(x+5)=40
Tính A = 1 x 2 x 3 + 2 x 3 x 4 + 3 x 4 x 5 + ... + 18 x 19 x 20
tìm x
2*x+12=40 5*x-28=52 60:x+15=20 280:x-18=10
(x-5)*5=0 25*(x-12)=25 (x+5):6=13 (x-30):12=70
1) 2*x-16=32 2) 3*(x-12)=18 3) 2436:x=24:2
6*x-5=613 x-36:18+12
trình bày đầy đủ hộ mik vs
tìm x
a) X-2/7=1/5
b) 15/8-X=3/2
c) X x 7/5=7/20
d) 18/25 : X=9/5
