X : ( 98 + 98 ) = 27
X : 196 = 27
X = 27 x 196
X = 5292
X x 8 = 16
X = 16 : 8
X = 2
X$ : 16$ = 27$
X$ = 27$ x 16$
X$ = 432
X : ( 98 + 98 ) = 27
X : 196 = 27
X = 27 x 196
X = 5292
X x 8 = 16
X = 16 : 8
X = 2
X$ : 16$ = 27$
X$ = 27$ x 16$
X$ = 432
Tính nhanh:
37 x 27 + 63 x 27
1+2+3+4+...+97+98+99
1+2+3+4+5+6+7+8+9+10
2*x+5*x-3*x=125:4+27:3
(x+1)+(x+2)+...+(x+98)+(x+99)=9900
Tính nhanh:
2/3 x 4/5 + 4/5 x 8/3 27/32 x 16/9 - 27/32 x 7/9 + 27/32
Bài 1 tìm x
a)30+X=120÷5+27
b)40-3×X=13
c)2×X-8=16
d)1/2×X-1/3=1/4
Giúp em với ạ
2 tìm x sao cho ( 18,6 nhân 16 nhân x - 3 phần 2 + 139,5 - 238 nhân x phần 5 ) : ( 1 + 8 + 15 +22 + ..... + 282 + 288
a,27 x 121 - 87 x 27 + 73 x 34
b, 125 x 98 - 125 x 46 - 52 x 25
KHẨN CẤP!!!
(2+4+6+8+...+98+100)x 10/2+4+8+16+...+512-2
1 200-18 :(372:3 *x-1)-28=166
(7*13+8*13):(9va2/3-x)=39
x=(6va3/5:s6-0,125 *8+2va2/15*0,03)*11/4
(100-99+98-97+96-95+....+4-3+2-1):50 +2010-12*x=91
2 A= 1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256+1/512+1/1024
B=27.45+27.55/2+4+...+16+18
Tính :
N = ( 1/2x4 + 1/4x6 + 1/6x8 + 1/8x10 + ....... + 1/98 X 100 ) : ( 1/2 + 1/4 + 1/8 + 1/16 + ........ + 1/512 )