a,2-|3/4-x|=7/12 b,1/2x+1/8=3/4 c,(2x-4,5)chia3/4-1/3 giup minh voi ai dung minh se tick nha thanhs you very much
Những câu hỏi liên quan
1/2 × x +150 ℅ × x = 2004
1/2 × x + 1/8x = 3/4
2- (3/4-x)= 7/12
(2x -4,5):3/4-1/3 =1
Bai 2 tinh gia tri bieu thuc
Q = (1/99+12/999+123/999)×(1/2-1/3-1/6)
℅ la phan tram
Nhanh nhe ai dung minh se thich va keu goi ban be thich nua thank you
2,
Q=\(\left(\frac{1}{99}+\frac{12}{999}+\frac{123}{999}\right)x\left(\frac{1}{2}-\frac{1}{3}-\frac{1}{6}\right)\)
= \(\left(\frac{1}{99}+\frac{12}{999}+\frac{123}{999}\right)x\left(\frac{3+\left(-2\right)+\left(-1\right)}{6}\right)\)
=\(\left(\frac{1}{99}+\frac{12}{999}+\frac{123}{999}\right)x0\)
Vậy Q=0
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tìm x
a, x + \(\frac{1}{6}\)=\(\frac{-3}{8}\)
b,\(\frac{1}{2}\)x + 1/8x =3/4
c, 2-|3/4-x|=7/12
d,(2x-4,5) :3/4-1/3=1
(ai giai nhanh nhat va dung mk se tk cho)
a) x + \(\frac{1}{6}\)=\(-\frac{3}{8}\)
x=\(\frac{-3}{8}-\frac{1}{6}\)
x=\(\frac{-13}{24}\)
b)\(\frac{1}{2}\)x + \(\frac{1}{8}\)x = \(\frac{3}{4}\)
\(\left(\frac{1}{2}+\frac{1}{8}\right)\)x = \(\frac{3}{4}\)
\(\frac{5}{8}\)x = \(\frac{3}{4}\)
x = \(\frac{3}{4}:\frac{5}{8}\)
x =\(\frac{6}{5}\)
c) 2 - l3/4-xl=7/12
l3/4-xl=17/12
nếu 3/4 - x > 0
thì 3/4 - x = 17/12
x= -2/3
nếu 3/4 - x <0
thì 3/4 - x = -17/12
x = 13/6
d) \(\left(2x-4.5\right):\frac{3}{4}-\frac{1}{3}=1\)
\(\left(2x-4.5\right):\frac{3}{4}=\frac{4}{3}\)
\(2x-4.5=1\)
2x = 5.5
x = 2.75
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a, x + 1/6 = -3/8
x = -3/8 - 1/6
x = -13/24
b, 1/2x + 1/8x = 3/4
x * (1/2+1/8) = 3/4
x * 5/8 = 3/4
x = 3/4 : 5/8
x = 6/5
c, 2 - |3/4-x| = 7/12
|3/4-x| = 2 - 7/12
|3/4-x| = 17/12
=> 3/4 - x = 17/12 hoặc -17/12
# 3/4 - x = 17/12
=> x = -2/3
# 3/4 - x = -17/12
=> x = 13/6
=> x = { -2/3 ; 13/6}
d, (2x - 4,5) : 3/4 -1/3 = 1
(2x - 4,5) : 3/4 = 1 + 1/3
(2x - 4,5 ) : 3/4 = 4/3
2x - 4,5 = 4/3 * 3/4
2x - 4,5 = 1
2x = 1 + 4,5
2x = 5,5
x = 5,5 : 2
x = 2,75
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a) \(x+\frac{1}{6}=-\frac{3}{8}\) c) \(2-\left|\frac{3}{4}-x\right|=\frac{7}{12}\)
<=> \(x=-\left(\frac{3}{8}+\frac{1}{6}\right)\) <=> \(\left|\frac{3}{4}-x\right|=2-\frac{7}{12}\)
<=> \(x=-\left(\frac{9}{24}+\frac{4}{24}\right)\) <=> \(\left|\frac{3}{4}-x\right|=\frac{24}{12}-\frac{7}{12}\)
<=> \(x=-\frac{13}{4}=-3\frac{1}{4}\) <=> \(\left|\frac{3}{4}-x\right|=\frac{17}{12}\)
Vậy: \(x=-3\frac{1}{4}\) => Có hai trường hợp:
b) \(\frac{1}{2}x+\frac{1}{8}x=\frac{3}{4}\) TH1: \(\frac{3}{4}-x=-\frac{17}{12}\) TH2: \(\frac{3}{4}-x=\frac{17}{12}\)
<=> \(\left(\frac{4}{8}+\frac{1}{8}\right)x=\frac{3}{4}\) <=> \(x=\frac{3}{4}+\frac{17}{12}\) <=> \(x=\frac{3}{4}-\frac{17}{12}\)
<=> \(\frac{5}{8}x=\frac{3}{4}\) <=> \(x=\frac{9}{12}+\frac{17}{12}\) <=> \(x=\frac{9}{12}-\frac{17}{12}\)
<=> \(x=\frac{3}{4}:\frac{5}{8}\) <=> \(x=\frac{26}{12}=2\frac{2}{12}\) <=> \(x=-\frac{8}{12}\)
<=> \(x=\frac{3}{4}\cdot\frac{8}{5}\) Vậy: \(x\in\left\{2\frac{2}{12};-\frac{8}{12}\right\}\)
<=> \(x=\frac{6}{5}=1\frac{1}{5}\) d) \(\left(2x-4,5\right):\frac{3}{4}-\frac{1}{3}=1\)
Vậy: \(x=1\frac{1}{5}\) <=> \(\left(2x-4,5\right):\frac{3}{4}=1+\frac{1}{3}\)
<=> \(\left(2x-4,5\right):\frac{3}{4}=\frac{3}{3}+\frac{1}{3}\)
<=> \(\left(2x-4,5\right):\frac{3}{4}=\frac{4}{3}\)
<=> \(2x-4,5=\frac{4}{3}\cdot\frac{3}{4}\)
<=> \(2x-4,5=1\)
<=> \(2x=1+4,5\)
<=> \(2x=5,5=\frac{11}{2}\)
<=> \(x=\frac{11}{2}:2\)
<=> \(x=\frac{11}{2}\cdot\frac{1}{2}\)
<=> \(x=\frac{11}{4}=2\frac{3}{4}\)
Vậy: \(x=2\frac{3}{4}\)
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Tinh P giup minh voi : P = 1+1/2(1+2)+1/3(1+2+3)+1/4(1+2+3+4)+...+1/16(1+2+3+...+16) . Ban nao lam duoc thi giup minh nha . Minh se tick ung ho .
bon voi nuoc chay vao be trong 3 gio thi day be neu voi thu 1 chay 1 minh thi trong 8 gio se day be voi thu 2 chay 1 minh trong 12 gio day be voi thu 3 chay 1 minh trong 10 gio day be hoi neu voi thu 4 chay mot minh thi trong bao nhieu gio day be?
co ai biet khong giai giup minh neu dung thi minh tick cho nhe!
minh ra 40 gio nhung khong biet dung ko boi vi cau day dang lam thi het thoi gian
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-x-20-(8-2x)=(-12-3)
Cac ban giup minh voi
Can gap nhe. Ai tra loi chi tiet va chinh xac minh se tick cho
-x-20-(8-2x)=(-12-3)
-x-20-8+2x=-15
x-28=-15
x=13
Vậy x=13
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Rut gon a biet a=(x^2-2x/2^2+8+2x^2/8-4x+2x^2-x^3)x(1-1/-2/^2)
Ai giup minh minh tick nha ::)))
a,|x-3| - | 2x-4| = 0
b, |3x-2| = x-1
c, |4-3x| = 2x+1
d, |4-2x| +|x+1| =6
giup minh voi
Tim x
A,740:(x+10)=102-2×13
B,12(x-1):3=43+23
C,10+2x:42011=42013
Giup minh voi minh dang gap lam !!!!
a) 740:(x+10)=102-2x13
=>740:(x+10)=100-2x13
=>740:(x+10)=1274
=>x=10,5808477237048(6)
6 là chu kì (có nghĩa là 6soos 6 kéo dài mãi mãi không giới hạn)
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1.Tìm số nguyên x biết:
a.-x/2+2x/3+x+1/4+2x+1/6=3/8
b.3/2x+1+10/4x+2+6/6x+3=12/26
2.Chứng minh:
a.1/2<1/51+1/52+...+1/100<1
b.7/12<1/21+1/22+...+1/40<5/6
Các bạn giúp mk ghi rõ lời giải nha!!
Ai trả lời đc mk tick cho!