194-(3*x-9*17)+24:3=30
Tìm x:
194 - ( 3 x X - 9 x 17 ) + 24 : 3 = 30
194 - ( 3 x \(x\) - 9 x 17 ) + 24 : 3 = 30
194 - ( 3 x \(x\) - 9 x 17 ) + 8 = 30
194 - ( 3 x \(x\) - 9 x 17 ) = 30 - 8
194 - ( 3 x \(x\) - 9 x 17 ) = 22
3 x \(x\) - 153 = 194 - 22
3 x \(x\) - 153 = 172
3 x \(x\) = 172 + 153
3 x \(x\) = 325
\(x\) = 325 : 3
\(x\) = 108,33
194 - ( 3 x X - 9 x 17 ) + 24 : 3 + 30
đề sai 1000000%
trong bộ đề thi HSG yoans lớp 5 đúng không bạn tick cho mình nha
194 - (3.x-9. 17 ) + 8 = 30
các bạn làm diễn giải ra cho mình nhé
Ta có :
194 - ( 3.x - 9.17 ) + 8 = 30
=> ( 3.x - 9.17 ) + 8 = 194 - 30 = 164
3.x - 153 = 164 - 8 = 156
3.x = 156 + 153
3.x = 309
=> x = 309 : 3
x = 103
Đ/s : 103
194-(3.x-9.17)+8=30
=> 194-(3x-9.17)=22
=> 3x-9.17=194-22
=> 3x-9.17=172
=> 3x-9=172:17
=> 3x-9=172/17
=> 3x =172/17+9
=> 3x=325/17
=> x=325/17:3
=> x=325/51
194-24:(44*x-3)-25=145
x *1/3:2/9-x:5=1 2/5
Trả lời:
\(194-24\div\left(44x-3\right)-25=145\)
\(\Leftrightarrow194-24\div\left(44x-3\right)=170\)
\(\Leftrightarrow24\div\left(44x-3\right)=24\)
\(\Leftrightarrow44x-3=1\)
\(\Leftrightarrow44x=4\)
\(\Leftrightarrow x=\frac{1}{11}\)
Vậy \(x=\frac{1}{11}\)
\(x\times\frac{1}{3}\div\frac{2}{9}-x\div5=1\frac{2}{5}\)
\(\Leftrightarrow x\times\frac{1}{3}\times\frac{9}{2}-x\times\frac{1}{5}=\frac{7}{5}\)
\(\Leftrightarrow x\times\frac{3}{2}-x\times\frac{1}{5}=\frac{7}{5}\)
\(\Leftrightarrow x\times\left(\frac{3}{2}-\frac{1}{5}\right)=\frac{7}{5}\)
\(\Leftrightarrow x\times\frac{13}{10}=\frac{7}{5}\)
\(\Leftrightarrow x=\frac{14}{13}\)
Vậy \(x=\frac{14}{13}\)
lp 5 chua hoc 4x moi chi hoc 44 * x thui nha!
194-24:(44×x-3)=145+25
194-24:(44×x-3)=170
24:(44×x-3)=194-170
24:(44×x-3)=24
(44×x-3)=24:24
(44×x-3)=1
44×x=1+3
44×x=4
x=4:44
x=1/11
vậy x=1/11
x-5=-1
x+30=-4
x-(-24)=3
22-(-x)=12
(x+5)+(x-9)=x+2
(x-29)-(17-38)=-9
\(x-5=-1\)
\(x=4\)
\(x+30=-4\)
\(x=-34\)
\(x+24=3\)
\(x=-21\)
\(22-\left(-x\right)=12\)
\(22+x=12\)
\(x=33\)
x - 5 = -1 => x = -1 + 5 = 4
x + 30 = -4 => x = -4 - 30 = -34
x - (-24) = 3 => x + 24 = 3 => x = 3 - 24 => x = -21
22 - (-x) = 12 => 22 + x = 12 => x = 22 - 12 = 10
( x + 5 ) + ( x - 9 ) = x + 2
=> x + 5 + x - 9 = x + 2
=> 2x + 5 - 9 = x + 2
=> 2x = x + 2 + 9 - 5 = x + 6
=> x = 6
tìm x thuộc Z biết:
câu a:-12(-x+7).(3-x)=5
câu b:30.(x+2-6).(x-5)-24.x=100.|-9-x|=17
Tìm x biết
d) 32%-0,25:x=-17/5
e)(x+1/5)^2+17/25=26/25
f)-32/27-(3x-7/9)^3=-24/27
g)60%x+0,4x+x:3=2
h)|20/9-x|=1/12+1/20+1/30+1/42+1/56+1/72
i)8/5+(2/7+2/17+2/37/5/7+5/17+5/37).x=16/5
Lưu ý: câu i 2/7+2/17+2/37 phần(vế trên) 5/7+5/17+5/37(vế dưới)
d) Ta có: \(32\%-0.25:x=-\dfrac{17}{5}\)
\(\Leftrightarrow0.25:x=\dfrac{8}{25}+\dfrac{17}{5}=\dfrac{93}{25}\)
hay \(x=\dfrac{25}{372}\)
Vậy: \(x=\dfrac{25}{372}\)
e) Ta có: \(\left(x+\dfrac{1}{5}\right)^2+\dfrac{17}{25}=\dfrac{26}{25}\)
\(\Leftrightarrow\left(x+\dfrac{1}{5}\right)^2=\dfrac{9}{25}\)
\(\Leftrightarrow\left[{}\begin{matrix}x+\dfrac{1}{5}=\dfrac{3}{5}\\x+\dfrac{1}{5}=-\dfrac{3}{5}\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{2}{5}\\x=-\dfrac{4}{5}\end{matrix}\right.\)
Vậy: \(x\in\left\{\dfrac{2}{5};-\dfrac{4}{5}\right\}\)
f) Ta có: \(-\dfrac{32}{27}-\left(3x-\dfrac{7}{9}\right)^3=-\dfrac{24}{27}\)
\(\Leftrightarrow\left(3x-\dfrac{7}{9}\right)^3=\dfrac{-8}{27}\)
\(\Leftrightarrow3x-\dfrac{7}{9}=-\dfrac{2}{3}\)
\(\Leftrightarrow3x=\dfrac{1}{9}\)
hay \(x=\dfrac{1}{27}\)
g) Ta có: \(60\%\cdot x+0.4x+x:3=2\)
\(\Leftrightarrow\dfrac{4}{3}x=2\)
hay \(x=\dfrac{3}{2}\)
Vậy: \(x=\dfrac{3}{2}\)
h) PT \(\Leftrightarrow\left|\dfrac{20}{9}-x\right|=\dfrac{2}{9}\) \(\Rightarrow\left[{}\begin{matrix}\dfrac{20}{9}-x=\dfrac{2}{9}\\x-\dfrac{20}{9}=\dfrac{2}{9}\end{matrix}\right.\) \(\Leftrightarrow\left[{}\begin{matrix}x=2\\x=\dfrac{22}{9}\end{matrix}\right.\)
Vậy ...
i) PT \(\Leftrightarrow\dfrac{8}{5}+\dfrac{2}{5}x=\dfrac{16}{5}\) \(\Leftrightarrow\dfrac{2}{5}x=\dfrac{8}{5}\) \(\Leftrightarrow x=4\)
Vậy ...
1) 9.(x+7)-12=24
2) 12-3x=(-30)
3) 95-105:x=60
4) x+35=12
5) (-24)-(10-x)=43
6) 6-(17+x)=(-16)
7) (x-18)-(-3)=0
8) 25-(x-6)=(-1)
Ai giải hết mình tick
1) 9 . (x + 7) - 12 = 24
9 . (x + 7) = 24 + 12
9 . (x + 7) = 36
x + 7 = 36 : 9
x + 7 = 4
x = 4 - 7
x = -3
2) 12 - 3x = -30
3x = 12 - (-30)
3x = 12 + 30
3x = 42
x = 42 : 3
x = 14
3) 95 - 105 : x = 60
105 : x = 95 - 60
105 : x = 35
x = 105 : 35
x = 3
4) x + 35 = 12
x = 12 - 35
x = -23
5) (-24) - (10 - x) = 43
-24 - 10 + x = 43
-34 + x = 43
x = 43 - (-34)
x = 43 + 34
x = 77
6) 6 - (17 + x) = -16
6 - 17 - x = -16
-11 - x = -16
x = -11 - (-16)
x = -11 + 16
x = 5
7) (x - 18) - (-3) = 0
x - 18 + 3 = 0
x - 18 = 0 - 3
x - 18 = -3
x = -3 + 18
x = 15
8) 25 - (x - 6) = -1
25 - x + 6 = -1
25 - x = -1 - 6
25 - x = -7
x = 25 - (-7)
x = 25 + 7
x = 32
1)9.(x+7)-12=24
9.(x+7)=24+12
9.(x+7)=36
x+7=36:9
x+7=4
x=4-7
x=-3
2)12-3x=-30
3x=12-(-30)
3x=42
x=42:3
x=14
tìm X
194-24:(12:3*X-3)-25=145
194 - 24 : ( 12 : 3 . x - 3 ) - 25 = 145
194 - 24 : ( 4 . x - 3 ) - 25 = 145
194 - 24 : ( 4 . x - 3 ) = 145 + 25
194 - 24 : ( 4 . x - 3 ) = 170
24 : ( 4 . x - 3 ) = 194 - 170
24 : ( 4 . x - 3 ) = 24
4 . x - 3 = 24 : 24
4 . x - 3 = 1
4 . x = 1 + 3
4 . x = 4
x = 4 : 4
x = 1
- Hok t -
194 - 24 : ( 12 : 3 . x - 3 ) - 25 = 145
194 - 24 : ( 12 : 3 . x - 3) = 145 + 25
194 - 24 : ( 12 : 3 . x - 3 ) = 170
24 : ( 12 : 3 . x - 3 ) = 194 - 170
24 : ( 12 : 3 . x - 3 ) = 24
12 : 3 . x - 3 = 24 : 24
12 : 3 . x - 3 = 1
12 : 3 . x = 1 + 3
12 : 3 . x = 4
3 . x = 12 : 4
3 . x = 3
x = 3 : 3
x = 1
-HT-
Tính?
a) 24 x 30 36 x 40 72 x 60 89 x 50
Mẫu: 24 x 30 = (24 x 3) x 10 = 720
b) 130 x 20 450 x 70 2 300 x 500 17 000 x 30
Mẫu: 130 x 20 = (13 x 2) x 100 = 2 600
a,
36 x 40 = (36 x 4) x 10 = 144 x 10 = 1 440
72 x 60 = (72 x 6) x 10 = 432 x 10 = 4 320
89 x 50 = (89 x 5) x 10 = 445 x 10 = 4 450
b,
450 x 70 = (45 x 7) x 100 = 315 x 100 = 31 500
2300 x 500 = (23 x 5) x 10 000 = 115 x 10 000 = 1 150 000
17 000 x 30 = (17 x 3) x 10 000 = 510 000