| x + 4 | + 12 = 26 ( tìm x )
5 ngày 14 giờ chia 4
tìm x
X x 3 - 12 = 26
5 ngày 14 giờ : 4 = 134 giờ : 4 = 33,5 giờ
Tìm x:
X x 3 - 12 = 26
X x 3 = 26 + 12
X x 3 = 38
X = 38 : 3
X = 12,66
1) 5 ngày 14 giờ : 4
= 134 giờ : 4 = 33,5 giờ
2) \(x\times3-12=26\)
\(x\times3=26+12\)
\(x\times3=38\)
\(x=38\div3\)
\(x=\approx12,67\)
Tìm x :
x + 27 = 12 . 4
3x - 4 = 26
kbn nhé mn
\(x+27=12.4\)
\(\Leftrightarrow x+27=48\)
\(\Leftrightarrow x=48-27\)
\(\Leftrightarrow x=21\)
\(3x-4=26\)
\(\Leftrightarrow3x=26+4\)
\(\Leftrightarrow3x=30\)
\(\Leftrightarrow x=30:3\)
\(\Leftrightarrow x=10\)
\(X+27=12\cdot4\)
\(X+27=48\)
\(X\) \(=48-27\)
\(X\) \(=21\)
\(3x-4=26\)
\(3x\) \(=26+4\)
\(3x\) \(30\)
x + 27 =12.4 3x-4=26
x+27=48 3x=26+4
x=48 -27 3x=30
x=21 x=30/3
x=10
tìm các số nguyên x y z biết 12/26 =-x/4=21/y=z/180
\(\frac{12}{26}=\frac{-x}{4}=\frac{21}{y}=\frac{z}{180}\)
\(\Rightarrow\frac{12}{26}=\frac{-x}{4}\Leftrightarrow-x.26=48\Leftrightarrow x=\frac{-24}{13}\)
\(\Rightarrow\frac{12}{26}=\frac{21}{y}\Leftrightarrow12.y=546\Leftrightarrow y=\frac{91}{2}\)
\(\Rightarrow\frac{12}{26}=\frac{z}{180}\Leftrightarrow z.26=2160\Leftrightarrow z=\frac{1080}{13}\)
Vậy : ...
chúc bạn học tốt
x=o,46153846153
y=-0,11538461538
z=-182,000000007
x=-13/16
y=273
z=55/5/13
1.tìm x để A nhập giá trị A=x/12
2-x^30+x^28+x^26+.....+x^4+x^2+1/b^28+x^24+x^20+....+x^1+x^4+1
tìm x thuộc Z :
x-1=2-4-6+10-12-14+16+18-20-22+24+26
Tìm x, biết:
a) 0 , ( 37 ) + 0 , ( 62 ) . x = 10
b) 0 , ( 12 ) : 1 , ( 6 ) = x : 0 , ( 4 )
c) 0 , ( 37 ) . x = 1
d) 0 , ( 26 ) . x = 1 , 2 ( 31 )
Tìm X:
h/ (3 . X-4) : X + 10=12
k/ (5 . X+7) :X + 20=26
m/ X. 1999-X=1999.1997+1999
a, tìm x thuộc tập { 13; 16; 20; 24 } biết 48 + x chia hết cho 8
b, tìm x thuộc tập{ 12; 17; 20; 26} biết 56- x không chia hết cho 4
Bài 6 . Tìm x biết: 1) 58 + 7x = 100 AI LM ĐC MÌNH CHO 20 XU
2) 101 +(36 – 4x) =105
3) 3x – 7 = 28
4) ( x – 12):12=12
5) x – 56 : 4= 16
6) (3.x-2 4 ).73=2.74
7) 71 – (33 + x) = 26
8) = 7 10) 4(x + 41) = 400
9) 45 – (x + 9):2 = 6
11) 2. (x + 7) – 25 = 13
13) 2(x- 51) = 2.23 + 20
15) 450 : (x – 19) = 50
17) 10 - (x – 3): 2 = 72 – 1 10
19) 2x + 2 – 2 x = 48
8) 140 : (x – 12) 5(x – 9) = 350
14) 2x – 49 = 5.32
16) 200 – (2x + 6) = 43
18) 135 – 5.(x + 4) = 35
20) (3x – 5)3 – 1 = 26
\(1,\Leftrightarrow7x=42\Leftrightarrow x=6\\ 2,\Leftrightarrow36-4x=4\Leftrightarrow4x=32\Leftrightarrow x=8\\ 3,\Leftrightarrow3x=35\Leftrightarrow x=\dfrac{35}{3}\\ 4,\Leftrightarrow x-12=144\Leftrightarrow x=156\\ 5,\Leftrightarrow x-14=16\Leftrightarrow x=30\\ 6,\Leftrightarrow3x-24=\dfrac{148}{73}\Leftrightarrow3x=\dfrac{1900}{73}\Leftrightarrow x=\dfrac{1900}{219}\\ 7,\Leftrightarrow33+x=45\Leftrightarrow x=12\\ 8,Sai.đề\\ 9,\Leftrightarrow\left(x+9\right):2=39\Leftrightarrow x+9=78\Leftrightarrow x=69\\ 11,\Leftrightarrow2\left(x+7\right)=38\Leftrightarrow x+7=19\Leftrightarrow x=12\\ 13,\Leftrightarrow2\left(x-51\right)=66\Leftrightarrow x-51=33\Leftrightarrow x=84\)
\(15,\Leftrightarrow x-19=9\Leftrightarrow x=28\\ 17,\Leftrightarrow\left(x-3\right):2=48\Leftrightarrow x-3=96\Leftrightarrow x=99\\ 19,\Leftrightarrow0x=46\Leftrightarrow x\in\varnothing\\ 8,Sai.đề\\ 14,\Leftrightarrow2x=209\Leftrightarrow x=\dfrac{209}{2}\\ 16,\Leftrightarrow2x+6=157\Leftrightarrow2x=151\Leftrightarrow x=\dfrac{151}{2}\\ 18,\Leftrightarrow5\left(x+4\right)=100\Leftrightarrow x+4=20\Leftrightarrow x=16\\ 20,\Leftrightarrow\left(3x-5\right)^3=27=3^3\Leftrightarrow3x-5=3\Leftrightarrow x=\dfrac{8}{3}\)