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\(\frac{2}{3}+\frac{8}{35}< \frac{x}{105}< \frac{1}{7}+\frac{2}{5}+\frac{1}{3}\)
\(\frac{94}{105}< \frac{x}{105}< \frac{92}{105}\)
\(\Rightarrow94< x< 92\)
mà x là số tựu nhiên => \(x\in\varnothing\)
\(\Leftrightarrow\frac{-2}{17}\le\frac{x}{17}\le\frac{2}{17}\Rightarrow x\in\left(-2;-1;0;1;2\right)\)
\(\Leftrightarrow\frac{-1}{24}\le\frac{x}{24}\le\frac{5}{24}\Rightarrow x\in\left(-1;0;1;2;3;4;5\right)\)
2 câu sau tự làm nha
\(-\frac{5}{17}+\frac{3}{17}\le\frac{x}{17}\le\frac{13}{17}+-\frac{11}{17}\)
\(\frac{-2}{17}\le\frac{x}{17}\le\frac{2}{17}\)
=> \(x\in\left\{-2;-1;0;1;2\right\}\)
\(\frac{x-2}{2}-\frac{1+x}{3}=\frac{4-3x}{4}-1\)
\(\Leftrightarrow\frac{3\left(x-2\right)-2\left(1+x\right)}{6}=\frac{4-3x-4}{4}\)
\(\Leftrightarrow\frac{3x-6-2-2x}{6}=-\frac{3x}{4}\)
\(\Leftrightarrow\frac{x-8}{6}=-\frac{3x}{4}\)
\(\Leftrightarrow4x-32=-18x\)
\(\Rightarrow x=\frac{16}{11}\)
giúp mik nha chiều này 6:00 mik nộp rồi
ai nhanh mik sẽ k cho 3 k
\(2\frac{3}{5}x-\frac{1}{7}=1\frac{9}{35}\)
\(\frac{13}{5}x=\frac{44}{35}+\frac{1}{7}\)
\(\frac{13}{5}x=\frac{7}{5}\)
\(x=\frac{7}{5}:\frac{13}{5}\\ x=\frac{7}{13}\)
\(\frac{13}{5}x=\frac{7}{5}\Rightarrow x=\frac{7}{13}\)
\(\frac{14}{5}x+50=-34\Rightarrow\frac{14}{5}x=-84\)
\(\Rightarrow x=-30\)
\(\frac{x-7}{3}=\frac{-27}{7-x}\)
\(\Leftrightarrow\left(x-7\right)\left(7-x\right)=\left(-27\right).3\)
\(\Leftrightarrow7x-x^2-49+7x=-81\)
\(\Leftrightarrow-x^2+14x-49=-81\)
\(\Leftrightarrow-x^2+14x+32=0\)
\(\Leftrightarrow x^2-14x-32=0\)
\(\Leftrightarrow x^2+2x-16x-32=0\)
\(\Leftrightarrow x\left(x+2\right)-16\left(x+2\right)=0\)
\(\Leftrightarrow\left(x+2\right)\left(x-16\right)=0\)
\(\Leftrightarrow\orbr{\begin{cases}x+2=0\\x-16=0\end{cases}\Leftrightarrow\orbr{\begin{cases}x=-2\\x=16\end{cases}}}\)
P=50% x4/3 x10/7/35 x 0,75
P=1/2x4/3x357/35x3/4
P=4x357x3/2x3x35x4
P=357/70
P=51/10
\(P=50\%\cdot\frac{4}{3}\cdot10\frac{7}{35}\cdot0,75\)
\(P=\frac{1}{2}\cdot\frac{4}{3}\cdot\frac{51}{5}\cdot\frac{3}{4}\)
\(P=\frac{1\cdot4\cdot51\cdot3}{2\cdot3\cdot5\cdot4}=\frac{51}{2\cdot5}=\frac{51}{10}\)
\(P=\frac{51}{10}\)