tim X
X x 2/5 + X x17/10=1113/10
tim x;y de -xx(2-y)=10 (1-x)x(1+y)=-15
1 x 3 x 5 x 7 x 9 x 10 x 12 x 14 x 15 x17 x19 x20 = ?
ai nhanh mik tick cho ?
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
\(x+15,7=7,2\times2,5\)
\(x+15,7=18\)
\(x=18-15,7\)
\(x=2,3\)
Vậy \(x=2,3\)
\(x\times9,1+x\times1,9=26,4\)
⇔\(x\times\left(9,1+1,9\right)=26,4\)
\(x\times10=26,4\)
\(x=26,4:10\)
\(x=2,64\)
Vậy \(x=2,64\)
\(x:12,5=48-45,66\)
\(x:12,5=2,34\)
\(x=2,34\times12,5\)
\(x=29,25\)
Vậy \(x=29,25\)
Sửa đề:
\(x\times9,9+x\times10=12,5\)
⇔\(x\times\left(9,9+10\right)=12,5\)
\(x\times19,9=12,5\)
\(x=12,5:19,9\)
\(x=\dfrac{125}{199}\)
Vậy \(x=\dfrac{125}{199}\)
\(#PeaGea\)
10 x 10 x 10 x10 x 10 x 10 x 10 x10 x10 x a x 10 x 14 x 17 x17 (a x1) - 10 x 10 = ?
tim x biet
3/(x+2).(x+5) + 5/(x+5).(x+10) + 7/(x+10).(x+17) = x/(x+2).(x+17)
Với x thuộc tập hợp A = -2;-5;-10;-17
Bài 10:
xx + x + 5 = 125
xxx + xx + x + x = 992
4725 + xxx + xx + x = 54909
xxx - xx - x - 25 = 4430
xxx + xx + x + x + x + 1 = 1001
35655 - xxx - xx - x = 5274
( Nhớ trình bày cả cách giải giúp mk )
tim x
[ 61+(53-x)]x17=1785
[ 61 + ( 53 - x ) ] x 17 = 1785
61 + 53 - x = 1785 : 17
114 - x = 105
x = 114 - 105
x = 9
\(\left[61+\left(53-x\right)\right].17=1785\)
\(\Leftrightarrow61+\left(53-x\right)=105\)
\(\Leftrightarrow53-x=44\Leftrightarrow x=9\)
(61+(53-x))=1785:17
(61+(53-x))=105
53-x=105-61
53-x=44
x=53-44
x=9
tim x biet :3/[x+2][x+5]+5[x+5][x+10]+7/[x+10][x+15]=x/[x+12][x+17]