Tìm x biết :
x : 100 x 50 % = 25
kb mk k cho nha
thank ^-^
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ukm
x+50=100
=> x= 100-50
=> x= 50
vậy x= 50
ai tk mk mk tk lại ok
(X+1)+(x+2)+.....+(x+100)=5750
100.x+1+2+3+....+100 =5750
100.x+100.(100+1):2 =5750
100.x+100.50 =5750
100.x+5050 =5750
100.x =5750 - 5050
100.x =700
x =700 : 100
x =7
\(\left(x+1\right)+\left(x+2\right)+\left(x+3\right)+...+\left(x+100\right)=5750\)
\(\left(x+x+x+...+x\right)+\left(1+2+3+...+100\right)=5750\)
\(100x=5750-5050\)
\(100x=700\)
\(x=700\div100\)
\(x=7\)
Bài 1:
Ta có:
\(y-x=25\Rightarrow y=25+x\)
Mà \(7x=4y\Rightarrow7x=4\cdot\left(25+x\right)\)
\(7x=100+4x\)
\(\Rightarrow7x-4x=100\)
\(3x=100\)
\(x=\frac{100}{3}\)
A : 100 x 50 % = 25
A : 100 x 50 : 100 = 25
A : 100 x 50 = 25 x 100
A : 100 x 50 = 2500
A : 100 = 2500 : 50
A : 100 = 50
A = 50 x 100
A = 5000
A : 100 x 50 % = 25
=> A:100x1/2=25
=> A:100=25:2
=> A:100=12,5
=> A =12,5x100
=> A = 1250.
K mình nhé, cảm ơn
A = \(\dfrac{3^{100}.\left(-2\right)+3^{101}}{\left(-3\right)^{101}-3^{100}}\)
A = \(\dfrac{3^{100}.\left(-2\right)+3^{100}.3}{\left(-3\right)^{100}.\left(-3\right)-3^{100}}\)
A = \(\dfrac{3^{100}.\left(-2+3\right)}{3^{100}.\left(-3\right)-3^{100}}\)
A = \(\dfrac{3^{100}.1}{3^{100}.\left(-3-1\right)}\)
A = \(\dfrac{3^{100}}{3^{100}}\) . \(\dfrac{1}{-4}\)
A = - \(\dfrac{1}{4}\)
\(x-\left(\frac{5}{6}-x\right)=x-\frac{2}{3}\)
\(x-\frac{5}{6}+x-x+\frac{2}{3}=0\)
\(x-\frac{1}{6}=0\)
\(x=\frac{1}{6}\)
vậy \(x=\frac{1}{6}\)
=> x- (x-2/3)=5/6-x
=> x-x+2/3=5/6-x
=> 2/3 = 5/6-x
=> x= 5/6-2/3 = 1/6
x : 100 x 50% = 25
x : 100 x 50 : 100 = 25
x : 100 x 50 = 25 x 100
x : 100 x 50 = 2 500
x : 100 = 2 500 : 50
x : 100 = 50
x = 50 x 100
x = 5 000.
x:100.50%=25
x:100.0,5=25
x:50=25
x=25.50
x=1250