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\(\left\{{}\begin{matrix}26⋮x\\x\ge13\end{matrix}\right.\Rightarrow x\in\left\{13;26\right\}\)
\(\left\{{}\begin{matrix}16⋮x\\x< 8\end{matrix}\right.\Rightarrow x\in\left\{1;2;4\right\}\)
\(\left\{{}\begin{matrix}18⋮x\\0< x< 40\end{matrix}\right.\Rightarrow x\in\left\{1;2;3;6;9;18\right\}\)
\(\left\{{}\begin{matrix}x⋮15\\30< x< 40\end{matrix}\right.\Rightarrow x\in\varnothing\)
\(\left\{{}\begin{matrix}x⋮12\\22\le5x\le50\end{matrix}\right.\Rightarrow x\in\varnothing\)
\(\left\{{}\begin{matrix}x⋮4\\16\le x\le36\end{matrix}\right.\Rightarrow x\in\left\{16;20;24;28;32;36\right\}\)
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hung pham tien bn vào câu hỏi tương tự đi , có đấy
**** cho minh
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\(\frac{30x+40}{x}=1500:30\)
\(\frac{30x+40}{x}=50\)
Suy ra 30x+40= 50.x
40= 50x- 30x
40= 20x
x=40:20=2
\(1500:\frac{30x+40}{x}=30\)
\(\frac{30x+40}{x}=1500:30\)
\(\frac{30x+40}{x}=50\)
\(\Rightarrow30x+40=50x\)
\(30x+40-50x=0\)
\(40+\left(30x-50x\right)=0\)
\(40-20x=0\)
\(20\left(20-x\right)=0\)
\(\Rightarrow20-x=0\)
\(x=20\)
Vậy x = 20
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60x - 30x + 60 - 30 = 90
x.(60 - 30) + (60 - 30) = 90
x.30 + 30 = 90
30.(x+1) = 90
x+1 = 90 : 30
x+1 = 3
Vậy x = 3 - 1 = 2
Nhớ k cho mình nhé'! Thank you!!!
Giải
60x-30x+60-30=90
x.(60-30)+60-30=90
x.30+60-30=90
x.30+60=90+30
x.30+60=120
x.30=120-60
x.30=60
x=60:30
x=2