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\(3-\left(\frac{5}{\frac{3}{8}}+x-\frac{7}{\frac{5}{24}}\right):\frac{16}{\frac{2}{3}}=2\)
\(\Rightarrow3-\left(\frac{40}{3}+x-\frac{168}{5}\right):24=2\)
\(\Rightarrow\left(-\frac{304}{15}+x\right):24=1\)
\(\Rightarrow\frac{-304}{15}+x=24\)
\(\Rightarrow x=\frac{664}{15}\)
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2448:[119-[x-6]]=24
<=> 199 - ( x-6 ) = 2448 : 24 = 102
<=> x - 6 = 199 - 102 = 97
<=> x = 97 +6 = 103
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\(3+6+12+24+...+\frac{x}{2}+x=12285\)
\(\Leftrightarrow x+\frac{x}{2}+...+24+12+6+3=12285\)
dễ thấy
\(\frac{x}{2}=x-\frac{x}{2}\)
..........
\(12=24-12\)
\(6=12-6\)
\(3=6-3\)
thay vào biểu thức ta có
\(x+x-\frac{x}{2}+...+24-12+12-6+6-3=12285\)
\(\Leftrightarrow x+x-3=12285\)
\(\Leftrightarrow2x-3=12285\)
\(\Leftrightarrow2x=12288\)
\(\Leftrightarrow x=6144\)
c2
\(3+6+12+24+...+\frac{x}{2}+x=12285\)
\(\Leftrightarrow\left(3.2\right)+\left(6.2\right)+\left(12.2\right)+\left(24.2\right)+...+\left(\frac{x}{2}.2\right)+\left(x.2\right)=12285.2\)nhân tất cả với 2
\(\Leftrightarrow6+12+24+48+...+x+x.2=24570\)
\(\Leftrightarrow\left(3+6+12+24+...+\frac{x}{2}+x\right)+x.2-3=24570\) thêm và bớt 3 vào vế trái
\(\Leftrightarrow12285+x.2-3=24570\)( giải thích vì 12285 = \(3+6+12+24+...+\frac{x}{2}+x\))
\(\Leftrightarrow x.2=12288\)
\(\Leftrightarrow x=12288:2=6144\)
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3/x = 1/y = 6/24
3/x = 6/24 = 3/12
Vậy x = 12
1/y = 6/24 = 1/4
Vậy y = 4
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x - ( 48 - 24 x 2 : 6 - 3 ) = 0
x = 48 - 24 x 2 : 6 - 3
x = 48 - 48 : 6 - 3
x = 48 - 8 - 3
x = 40 - 3
x = 37
Vậy x = 37
Tham khảo nha !!!
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x - 6:2-(48-24):2:6+3 = 0
x- 3 - 24 :2:6+3=0
x-3-2+3 = 0
x-3-2 = 0+3
x-3-2=3
x-3=3+2
x-3=5
x=5+3
x=8
x - 6 : 2 - ( 48 - 24 ) : 2 : 6 + 3 = 0
x - 6 : 2 - 24 : 2 : 6 + 3 = 0
x - 3 - 12 : 6 + 3 = 0
x - 3 - 2 + 3 = 0
x - 3 - 2 =0-3
x - 3 - 2 =-3
x - 3=-3+2
x - 3=-1
x=-1+3
x=2
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\((28\times15-34\times12)\times a:6+8=24\)
\(\Rightarrow12\times a:6=24-8\)
\(\Rightarrow2\times a=16\)
\(\Rightarrow a=16:2=8\)