a)2012÷x+23=526
b)1/2÷x+9,44=18,36
c)x-3/4=6×1/24
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a) 2012 : x + 23 = 526
2012 : x =526 -23
2012:x =503
b) x + 9,44 = 18,36
x =18,36 - 9 ,44
x =8,92
c) x - 3/4 = 6 * 1/24
x - 3 / 4 = 1 /4
x = 3/ 4 + 1 / 4
x = 1
d) x + 2/3 = 18 : 9 - 1
x + 2 / 3 = 1
x =1 - 2 / 3
x = 1 / 3
Chúc học tốt
a) \(x+9,44=18,36\)
\(\Leftrightarrow x=18,36-9,44\)
\(\Leftrightarrow x=8,92\)
b) \(2012\div x+23=526\)
\(\Leftrightarrow2012\div x+23=526\)
\(\Leftrightarrow2012\div x=526-23\)
\(\Leftrightarrow2012=503\times x\)
\(\Leftrightarrow x=2012\div503\)
\(\Leftrightarrow x=4\)
a) x + 9,44 = 18,36
x = 18,36 - 9,44
x = 8,92
b) 2012 : x + 23 = 526
2012 : x = 526 - 23
2012 :x = 503
x = 2012 : 503
x = 4
a)x+9,44=18,36
x=18,36-9,44
x=8,92
b)2012:x+23=526
2012:x =526-23
2012:x =503
x =2012:503
x =4
\(a,⇔\frac{x-23}{24}+\frac{x-23}{25}-\frac{x-23}{26}-\frac{x-23}{27}=0\)
\(⇔(x-23)(\frac{1}{24}+\frac{1}{25}-\frac{1}{26}-\frac{1}{27})=0\)
\(⇔x-23=0\) (vì \(\frac{1}{24}+\frac{1}{25}-\frac{1}{26}-\frac{1}{27}>0\))
\(⇔x=23\)
\(b,⇔\frac{x+100}{98}+\frac{x+100}{97}+\frac{x+100}{96}+\frac{x+100}{95}=0\)
\(⇔(x+100)(\frac{1}{98}+\frac{1}{97}+\frac{1}{96}+\frac{1}{95})=0\)
\(⇔x+100=0\) (vì \(\frac{1}{98}+\frac{1}{97}+\frac{1}{96}+\frac{1}{95}>0\))
\(⇔x=-100\)
\(c,⇔(\frac{x+1}{2012}+1)+(\frac{x+2}{2011}+1)=(\frac{x+3}{2010}+1)+(\frac{x+4}{2009}+1)\)
\(⇔\frac{x+2013}{2012}+\frac{x+2013}{2011}-\frac{x+2013}{2010}-\frac{x+2013}{2009}=0\)
\(⇔(x+2013)(\frac{1}{2012}+\frac{1}{2011}-\frac{1}{2010}-\frac{1}{2009})=0\)
\(⇔x+2013=0\) (vì \(\frac{1}{2012}+\frac{1}{2011}-\frac{1}{2010}-\frac{1}{2009}<0\))
\(⇔x=-2013\)
\(\frac{201-x}{99}+\frac{203}{97}=\frac{205}{95}+3\)
\(\frac{x-45}{55}+\frac{x-47}{53}=\frac{x-55}{45}+\frac{x-53}{47}\)
\(\frac{2-x}{2010}-1=\frac{1-x}{2011}-\frac{x}{2012}\)
Giúp mk với ạ
Câu a
2015 :x+53=456
2015 :x=456 - 53
2015: x=403
X =2015: 403
X=5
B)x+ 9, 44= 18, 36
X = 18, 36 - 9, 44
X = 8, 92
Vậy x bằng 8, 92
a) 2015:x+53=456
2015:x =456-53
2015:x =403
x =2015:403
x =5
b) x+9,44=18,36
x =18,36-9,44
x =8,92
c)x-\(\frac{3}{4}\)=6x\(\frac{1}{24}\)
x-\(\frac{3}{4}\) = \(\frac{1}{4}\)
x =\(\frac{1}{4}+\frac{3}{4}\)
x =1
a. 64x23+37x23-23
=23x(64+37-1)
=23x100=2300
b. 33,76+19,52+6,24
=(33,76+6,24)+19,52
=40+19,52=59,52
c.38/11+(16/13+6/11)
=38/11+6/11+16/13
=44/11+16/13
=4+16/13=68/13
d. 3/4:3/5-1/5= 5/4-1/5= 21/20
câu 2: 2012:X+23=526
2012:X=503
X=2012:503=4
b.X+9,44=18,36
X= 18,36-9,44=8,92
c. X-3/4=6x1/24
X-3/4=1/4
X=1/4+2/4=1
d. X+2/3= 18:9-1
X+2/3=2-1=1
X= 1-2/3=1/3
câu 3:a) chu vi:350 m
diện tích:7500 m2
b)ko hiểu]
câu 4:tự làm mỏi tay rồi
a)2012÷x+23=526
2012 : x = 503
x = 4
b)1/2÷x+9,44=18,36
1/2 : x = 8,92
x = 25/446
c)x-3/4=6×1/24
x - 3/4 = 1/4
x = 1
~.~