Tim x biet
a) 25,4 - \(\frac{1}{4}\): x + 1250%=37,5
b) \(3\frac{1}{8}\):(\(\frac{2}{5}\)- x) nhan \(\frac{8}{25}\)=3
Những câu hỏi liên quan
Câu 1 Tim số nguyên x, biet rằng4frac{1}{3}.left(frac{1}{6}-frac{1}{2}right)letimeslefrac{2}{3}.left(frac{1}{2}-frac{1}{2}-frac{3}{4}right)Câu 2 : Tính1frac{13}{15}.0,75-left(frac{104}{195}+25%right).frac{24}{47}-3frac{12}{13}:3Câu 3 ; Tìm x Bietleft(frac{1}{12}+3frac{1}{6}-30,75right).times-8left(frac{3}{5}+0,415+frac{1}{200}right):0,01Câu 4 : So Sánh Afrac{10^8+2}{10^8-1};
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Câu 1 Tim số nguyên x, biet rằng
\(4\frac{1}{3}.\left(\frac{1}{6}-\frac{1}{2}\right)\le\times\le\frac{2}{3}.\left(\frac{1}{2}-\frac{1}{2}-\frac{3}{4}\right)\)
Câu 2 : Tính
\(1\frac{13}{15}.0,75-\left(\frac{104}{195}+25\%\right).\frac{24}{47}-3\frac{12}{13}:3\)
Câu 3 ; Tìm x Biet
\(\left(\frac{1}{12}+3\frac{1}{6}-30,75\right).\times-8=\left(\frac{3}{5}+0,415+\frac{1}{200}\right):0,01\)
Câu 4 : So Sánh \(A=\frac{10^8+2}{10^8-1}\);
Câu 2 :
\(1\frac{13}{15}.0,75-\left(\frac{104}{195}+25\%\right).\frac{24}{47}-3\frac{12}{13}:3\)
\(\frac{28}{15}.\frac{3}{4}-\left(\frac{104}{195}+\frac{25}{100}\right).\frac{24}{47}-\frac{51}{13}:3\)
\(\frac{28}{15}.\frac{3}{4}-\frac{47}{60}.\frac{24}{47}-\frac{51}{13}:3\)
\(\frac{7}{5}-\frac{2}{5}-\frac{51}{13}.\frac{1}{3}\)
\(\frac{7}{5}-\frac{2}{5}-\frac{17}{13}\)
\(-\frac{4}{13}\)
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Câu 1:
\(-\frac{13}{9}\le x\le-\frac{1}{2}\)
\(x=-1\)
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Xem thêm câu trả lời
tim x biet
a\(\frac{3}{5}:\frac{7}{x}:\frac{3}{4}=\frac{8}{35}\)
b,\(x< \frac{7}{12}:\frac{4}{5}\)
a) \(1-\left(5\frac{3}{8}+x-7\frac{5}{24}\right):\left(-16\frac{2}{3}\right)=0\)
b) \(\left(\frac{x}{3}-5\frac{1}{4}\right)^2-\frac{-2}{5}=1\frac{1}{25}\)
c) \(\frac{17-x}{12}=\frac{3}{17-x}\)
d) \(1\frac{1}{3}-25\%\left(x-\frac{8}{3}\right)+2x=1,6:\frac{3}{5}\)
Tim x biet
a)\(\frac{8}{23}.\frac{46}{24}-x=\frac{1}{3}\)
b) \(\frac{10}{12}:x=\frac{28}{9}.\frac{3}{56}\)
c) \(\frac{x-12}{4}=\frac{1}{2}\)
\(\frac{8}{23}\cdot\frac{46}{24}-x=\frac{1}{3}\)
=> \(\frac{2}{3}-x=\frac{1}{3}\)
=> \(x=\frac{1}{3}\)
\(\frac{10}{12}\div x=\frac{28}{9}\cdot\frac{3}{56}\)
=> \(\frac{10}{12}\div x=\frac{1}{6}\)
=> \(x=\frac{60}{12}=5\)
\(\frac{x-12}{4}=\frac{1}{2}\)
=> \(\left(x-12\right)\cdot2=4\cdot1\)
=> \(2x-24=4\)
=> \(2x=28\)
=> \(x=14\)
bai 1 : tim x biet :1)frac{x-1}{18}frac{2}{3} 2)frac{64-4.x}{16}frac{15}{4} 3)frac{7}{8}frac{35}{2.x+2} 4)frac{5}{6}frac{3.x+1}{30}5)frac{4}{5}frac{16}{25-x} 6)frac{x}{15}frac{6}{x+1} vd: 2/3 x/123.x 2.123.x 24 x 24 : 3 x 8 vay x 8
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bai 1 : tim x biet :
1)\(\frac{x-1}{18}=\frac{2}{3}\) 2)\(\frac{64-4.x}{16}=\frac{15}{4}\) 3)\(\frac{7}{8}=\frac{35}{2.x+2}\) 4)\(\frac{5}{6}=\frac{3.x+1}{30}\)
5)\(\frac{4}{5}=\frac{16}{25-x}\) 6)\(\frac{x}{15}=\frac{6}{x+1}\)
vd: 2/3 =x/12
3.x = 2.12
3.x = 24
x = 24 : 3
x = 8
vay x = 8
1. Câu tl lun nà ~
( x-1). 3= 18.2
(x-1). 3 = 36
(x-1) = 36:3
(x-1) = 12
x = 12+1
x = 13
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2. Tl lun ó
(64-4x).4= 16.15
(64-4x).4= 240
(64-4x) = 240:4
60x = 60
x= 60:60
x= 1
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a) \(1-\left(5\frac{3}{8}+x-7\frac{5}{24}\right):\left(-16\frac{2}{3}\right)=0\)0
b) \(\left(\frac{x}{3}-5\frac{1}{4}\right)^2-\frac{-2}{5}=1\frac{1}{25}\)
c) \(1\frac{1}{3}-25\%\left(x-\frac{8}{3}\right)+2x=1,6:\frac{3}{5}\)
Các bạn giúp mk với, nhanh nhé, mk cần gấp
Câu a có 1 số 0 to thôi nhé!
tim cac so nguyen x biet
a)\(\frac{x-1}{9}\)=\(\frac{8}{3}\)
b)\(\frac{x+2}{3}\)=\(\frac{2x-1}{5}\)
a, \(\frac{x-1}{9}=\frac{8}{3}\Leftrightarrow\frac{x-1}{9}=\frac{24}{9}\Leftrightarrow x-1=24\Leftrightarrow x=25\)
b, \(\frac{x+2}{3}=\frac{2x-1}{5}\Leftrightarrow\frac{5x+10}{15}=\frac{6x-3}{15}\Leftrightarrow5x+10=6x-3\)
\(\Leftrightarrow5x+10-6x+3=0\Leftrightarrow-x+13=0\Leftrightarrow x=13\)
a) \(\frac{x-1}{9}=\frac{8}{3}\)
\(\Leftrightarrow3\left(x-1\right)=8.9\)
\(\Leftrightarrow3x-3=72\)
\(\Leftrightarrow3x=75\)
\(\Leftrightarrow x=25\)
b) \(\frac{x+2}{3}=\frac{2x-1}{5}\)
\(\Leftrightarrow5\left(x+2\right)=3\left(2x-1\right)\)
\(\Leftrightarrow5x+10=6x-3\)
\(\Leftrightarrow5x-6x=-3-10\)
\(\Leftrightarrow-x=-13\)
\(\Leftrightarrow x=13\)
1) \(\frac{24}{-12}=\frac{x}{5}=\frac{-y}{3}\)Tìm x và y
2) \(\frac{1}{3}+\frac{-2}{5}+\frac{1}{6}+\frac{-5}{25}\le\frac{x}{10}< \frac{-3}{4}+\frac{4}{14}+\frac{-2}{8}+\frac{-3}{5}+\frac{5}{7}\)Tìm x
3) \(\frac{8.x+18}{2.x+6}\)Tìm x
Tim cac so Nguyên x va y biet :
a) \(\frac{1}{y}+\frac{x}{4}=\frac{1}{2}\) b)\(\frac{5}{x}+\frac{y}{4}=\frac{1}{8}\)
a) \(\frac{1}{y}+\frac{x}{4}=\frac{1}{2}\)
\(\Rightarrow\frac{1}{y}=\frac{1}{2}-\frac{x}{4}\)
\(\Rightarrow\frac{1}{y}=\frac{2-x}{4}\)
\(\Leftrightarrow\left(2-x\right).y=4\)
Do \(x,y\inℤ\Rightarrow2-x,y\inℤ\)
nên \(2-x,y\) là các cặp ước của 4
Ta có bảng giá trị :
| 2-x | 1 | -1 | 2 | -2 | 4 | -4 |
| x | 1 | 3 | 0 | 4 | -2 | 6 |
| y | 4 | -4 | -2 | 2 | 1 | -1 |
| Đánh giá | Chọn | Chọn | Chọn | Chọn | Chọn | Chọn |
Vậy : \(\left(x,y\right)\in\left\{\left(1,4\right);\left(3,-4\right);\left(0,-2\right);\left(4,2\right);\left(-2,1\right);\left(6,-1\right)\right\}\)
b) \(\frac{5}{x}+\frac{y}{4}=\frac{1}{8}\)
\(\Rightarrow\frac{5}{x}=\frac{1}{8}-\frac{y}{4}\)
\(\Rightarrow\frac{5}{x}=\frac{1-2y}{8}\)
\(\Leftrightarrow x.\left(1-2y\right)=40\)
Nhận xét x,y và lập bảng giá trị tương tự câu a).
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