x:10+x*9,9=30,25
x:100+x*0,99=5,25
15+15x5+15x3+15
Đố làm được đấy
Tìm x biết a x 10 x 9,9 30,25b x 100 x 0,99 5,25
tim x
x:10+2*9,9=30,25
x:100+x*0,99=5,25
a)X:10+2X9,9=30,25
X:10+2 =30,25:9,9=3,05
X:10 =3,05+2=5,05
X =5,05x10=50,5
Tìm x biết:
a)x :10 + x * 9,9 =30,25
b)x :100 + x * 0,99 = 5,25
15x2+15x3-15x5
15x2+15x3-15x5
=15x(2+3-5)
=15x0
=0
k mik nhé bn
x x 0,9+1/10=1/100+0,99
Tìm x biết
X x 9,9 + X : 10 = 20,06
X x 100,01 - X : 100 = 35,5
a/ => x.9,9 + x . 1/10 = 20,06
=> x(9,9 + 1/10) = 20,06
=> x = 2,006
b/ => x.100,01 - x.1/100 = 35,5
=> x(100,01 - 1/100) = 35,5
=> x = 0,355
Tìm x : X x 0,99 + X : 100 = 200,06
\(x\) \(\times\) 0,99 + \(x\) : 100 = 200,06
\(x\) \(\times\) 0,99 + \(x\) \(\times\) 0,01 = 200,06
\(x\) \(\times\) (0,99 + 0,01) = 200,06
\(x\) \(\times\) 1 = 200,06
\(x\) = 200,06
X x 0,99 + X : 100 = 2016
X . 0,99 + X : 100 = 2016
\(X.\frac{99}{100}+X.\frac{1}{100}=2016\)
\(X.\left(\frac{99}{100}+\frac{1}{100}\right)=2016\)
\(X.1=2016\)
x = 2016
X x 0,99 + X : 100 = 2016
X x 0,99 + X x 0,01 = 2016
X x ( 0,99 + 0,01 ) = 2016
X x 1 = 2016
X = 2016 : 1
X = 2016
Vậy X = 2016
Tìm x
X x 0,99 + X : 100 = 2019
\(x\times0,99+x:100=2019\\ \Rightarrow x\times0,99+x\times0,01=2019\\ \Rightarrow x\times\left(0,99+0,01\right)=2019\\ \Rightarrow x\times1=2019\\ \Rightarrow x=2019\)