13+\(\frac{x}{20}\)=\(\frac{3}{4}\)
=>\(\frac{x}{20}\)=\(\frac{3}{4}-13\)
=>\(\frac{x}{20}=\frac{3}{4}-\frac{52}{4}=-\frac{49}{4}=-\frac{245}{20}\)
=>x=-245
\(23-\frac{x}{25}=45\)
\(=>\frac{x}{25}=23-45=-22=-\frac{550}{25}\)
=>x=-550
tìm tất cả các phân số =ps 34/51 có mẫu là stn nhỏ hơn 13
5/x=y/20=-25/100
3/x-1=y+1/40=45/120
a) (x+73)-26=76
b) 45-(c+9)=6
c) 89-(73-x)=20
d) (x+7)-25=13
e) 198 - (x+4)=120
13=x\20=3\4
23-x\25=4\5
( 32/46 x Y - 16/23 x 21/23) : ( 12/25 + 5/8 x 13/6 - 36/45 : 3 ) = 0
tim Y
\(\frac{\text{0,24 x 450 + 0,8 x 15 x 3 + 3 x 3 x 8 }}{\text{65 -60 ++ 55 - 50 + 45 - 40 +....+ 25- 20 +5}}\)
Tim x:
a) \(\dfrac{13+x}{20}=\dfrac{3}{4}\)
b) \(\dfrac{23-x}{25}=\dfrac{4}{5}\)
X : 7 + 20 = 17 x 49 + 17 x 51 287 - ( X + 34) x 3 - 25 = 142 13 x X + 15 x X + 12 x X = 120
tìm x
a. 13+x\20 = 3\4
b.23-x\25 = 4\5
27*47+13*24+24*10*3
55-50+45-40+35-30+25-20+15-10+5
