6,25x X + 3,75 x X =60 giup tui voi
K
Khách
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LN
8
21 tháng 4 2018
x : 4 + x = 3,75
\(x\)x\(\frac{1}{4}\) + \(x=3,75\)
\(x\)x\(\left(\frac{1}{4}+1\right)=\frac{375}{100}\)
\(x\)x\(\frac{5}{4}=\frac{15}{4}\)
\(x=\frac{15}{4}:\frac{5}{4}\)
\(x=\frac{15}{4}\)x\(\frac{4}{5}\)
\(x=3\)
21 tháng 4 2018
\(\frac{x}{4}+x=3.75\)
\(x\left(\frac{1}{4}+1\right)=\frac{15}{4}\)
\(x\cdot\frac{5}{4}=\frac{15}{4}\)
\(x=\frac{15}{4}:\frac{5}{4}=3\)
N
0
YT
5
S
5 tháng 12 2018
\(x-5\inƯ\left(19\right)\Leftrightarrow x-5\in\left\{-1;1;-19;19\right\}\Leftrightarrow x\in\left\{4;6;-14;24\right\}\)
HN
5 tháng 12 2018
Ta có : x - 5 \(\in\)Ư(19)
Ư(19) = { 1 ; 19 }
=> x = 1 + 5 = 6 ; 19 + 5 = 24
V
3
AL
3 tháng 8 2016
\(x^2+x+1=0\)
\(=>x^2+2x+1=x\)
\(=>\left(x+1\right)^2=x\)
\(=>x+1=\sqrt{x}\)
=>loại
3 tháng 8 2016
\(B\left(x\right)=x^2+x+1\)
\(=\left(x^2+x+\frac{1}{4}\right)+\frac{3}{4}\)
\(=\left(x^2+2.x.\frac{1}{2}+\frac{1^2}{2^2}\right)+\frac{3}{4}\)
\(=\left(x+\frac{1}{2}\right)^2+\frac{3}{4}\)
Ta có :
\(\left(x+\frac{1}{2}\right)^2\ge0\)
\(\Rightarrow\left(x+\frac{1}{2}\right)^2+\frac{3}{4}\ge\frac{3}{4}\)
\(\Rightarrow B\left(x\right)>0\)với mọi \(x\)
Vậy \(B\left(x\right)\)vô nghiệm.
PH
0
16 tháng 7 2016
a, |x| - x = \(\frac{3}{4}\)
nếu x > hoặc = 0
suy ra |x| = x
|x| - x = 0
vậy x < 0
suy ra
|x| - ( -x ) = \(-\frac{3}{4}\)
|x| + x = \(-\frac{3}{4}\)
2 . x = \(-\frac{3}{4}\)
x = \(-\frac{3}{8}\)
nói rõ lại đề b hộ tôi vs
2 .
NN
3
6 tháng 3 2023
Tham khảo:
Natural disasters are one of the biggest problems that Vietnamese have to face to face nowadays. One of the most common natural disaster in Vietnam is hurricane. The hurricane can cause damage to houses and peoples. A lot of people lose homes and property. Not only that, they also suffer the pain of losing their relatives and their friends. After understanding the bad effects of hurricanes, there are some solutions to prevent the hurricanes. Firstly, you should always update the news about the hurricanes and floods. Secondly, you should prepare essential things such as water, food, clothes, medicines, first-aid-kits,...Thirdly, we should reinforce our house and always be ready to evacuate. In conclusion, I can say that natural disasters are extremely dangerous, but we can prevent them by doing what I say.
LD
13 tháng 4 2023
Natural disasters are one of the biggest problems that Vietnamese have to face to face nowadays. One of the most common natural disaster in Vietnam is hurricane. The hurricane can cause damage to houses and peoples. A lot of people lose homes and property. Not only that, they also suffer the pain of losing their relatives and their friends. After understanding the bad effects of hurricanes, there are some solutions to prevent the hurricanes. Firstly, you should always update the news about the hurricanes and floods. Secondly, you should prepare essential things such as water, food, clothes, medicines, first-aid-kits,...Thirdly, we should reinforce our house and always be ready to evacuate. In conclusion, I can say that natural disasters are extremely dangerous, but we can prevent them by doing what I say.
6,25x X+3,75xX=60
=>X(6,25+3,75)=60
=>10X=60
=>X=6