tìm x
25-x/995+21-x/999+17-x/999=11-x/334
25-x / 995 + 21-x /997 +17-x / 999 = 11-x / 334. Tìm x
(25-x) / 995 + (21-x) /997 +(17-x) / 999 = (11-x) / 334. Tìm x.
Tìm x , biết : \(\frac{25-x}{995}+\frac{21-x}{997}+\frac{17-x}{999}=\frac{11-x}{334}\)
\(\frac{25-x}{995}+\frac{21-x}{997}+\frac{17-x}{999}=\frac{11-x}{334}\)
\(\Rightarrow\frac{25-x}{995}+2+\frac{21-x}{997}+\frac{17-x}{999}+2=\frac{11-x}{334}+6\)
\(\Rightarrow\frac{25-x}{995}+\frac{1990}{995}+\frac{21-x}{997}+\frac{1994}{997}+\frac{17-x}{999}+\frac{1998}{999}=\frac{11-x}{334}+\frac{2004}{334}\)
\(\Rightarrow\frac{2015-x}{995}+\frac{2015-x}{997}+\frac{2015-x}{999}=\frac{2015-x}{334}\)
\(\Rightarrow\frac{2015-x}{995}+\frac{2015-x}{997}+\frac{2015-x}{999}-\frac{2015-x}{334}=0\)
\(\Rightarrow\left(2015-x\right)\left(\frac{1}{995}+\frac{1}{997}+\frac{1}{999}+\frac{1}{334}\right)=0\)
\(\Rightarrow2015-x=0\left(\text{vì }\frac{1}{995}+\frac{1}{997}+\frac{1}{999}+\frac{1}{334}\ne0\right)\)
\(\Rightarrow x=2015\)
tìm x
26-x/995 + 22-x/997 + 18-x/999 = 12-x/334
tìm x biết
\(\frac{26-x}{995}+\frac{22-x}{997}+\frac{18-x}{999}=\)\(\frac{12-x}{334}\)
nhanh nha mấy chế !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
\(\frac{26-x}{995}\)+2+\(\frac{22-x}{997}\)+\(\frac{18-x}{999}\)+2=\(\frac{12-x}{334}\)+6
\(\frac{2016-x}{995.2}\)+\(\frac{2016-x}{997.2}\)+\(\frac{2016-x}{999.2}\)-\(\frac{2016-x}{334.6}\)=0
(2016-x)(\(\frac{1}{995.2}\)+\(\frac{1}{997.2}\)\(\frac{1}{999.2}\)-\(\frac{1}{334.6}\))=0
Dễ thấy giá trị biểu thức trong ngoặc thứ 2 khác 0
Nên 2016-x=0=>x=2016
Vậy giá trị của x là 2016
Tìm x, biết x là số tròn nghìn và 11 999 < x < 17 009
Mình cảm ơn
\(11999< x< 17009\)
\(\Rightarrow x=12000;13000;14000;15000;16000;17000\) (x là số tròn nghìn)
Các giá trị thỏa mãn x : 12000 ; 13000 ; 14000 ; 15000 ; 16000 ; 17000
31-x/995 + 27-x/997 + 23-x/995= 17-x/334 ai giúp mk mk sẽ cho tích
222 222 x 999 999 + 333 333 x 333 334
(Tính nhanh)
Giúp mình nha
Bài 17: Tìm x :
a) x + 175 + 1225 = 1482
b) x – 850 + 750 = 1000
c) 999 – x = 999 - 921
a)\(x=1482-\left(175+1225\right)=1482-1400=82\)
b)\(x=\left(1000-750\right)+850=1100\)
c)\(x=999-\left(999-921\right)=999-78=921\)
a) \(\text{ x + 175 + 1225 = 1482}\)
\(x+175=1482-1225\)
\(x+175=257\)
\(x=257-175\)
\(x=82\)
b) \(\text{ x – 850 + 750 = 1000}\)
\(x-850=1000-750\)
\(x-850=250\)
\(x=1100\)
c) \(\text{ 999 – x = 999 - 921}\)
\(999-x=78\)
\(x=999-78\)
\(x=921\)
a) x + 175 + 1225 = 1482
x + (175 + 1225)= 1482
x + 1400 = 1482
x = 1482
b)x – 850 + 750 = 1000
x - ( 850 + 750) = 1000
x - 1600 = 1000
x = 1000 + 1600
x = 2600
c)999 – x = 999 - 921
999 – x = 78
x = 999 –78
x = 921