36 : x = 9/10
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9 giờ 36 phút : 36 = 0 giờ 16 phút
34,56 : x = 36 : 10
34,56 : x = 3,6
x = 34,56 : 3,6
x = 9,6
đổi: 9 giờ 36 phút= 576 phút
9 giờ 36 phút / 36= 16 phút
34.56/x=36/10
34.56/x=3.6
x=34.56/3.6
x=9.6
nhớ k cho mik nha!!!
\(\frac{x}{6}+\frac{x}{10}+\frac{x}{15}+\frac{x}{21}+\frac{x}{28}+\frac{x}{36}=\frac{8}{9}\)
\(\Leftrightarrow\frac{x}{12}+\frac{x}{20}+\frac{x}{30}+\frac{x}{42}+\frac{x}{56}+\frac{x}{72}=\frac{8}{18}=\frac{4}{9}\)
\(\Leftrightarrow\frac{x}{3.4}+\frac{x}{4.5}+\frac{x}{5.6}+\frac{x}{6.7}+\frac{x}{7.8}+\frac{x}{8.9}=\frac{4}{9}\)
\(\Leftrightarrow\frac{x}{3}-\frac{x}{4}+\frac{x}{4}-\frac{x}{5}+\frac{x}{5}-\frac{x}{6}+...+\frac{x}{8}-\frac{x}{9}=\frac{4}{9}\)
\(\Leftrightarrow\frac{x}{3}-\frac{x}{9}=\frac{4}{9}\Leftrightarrow\frac{2x}{9}=\frac{4}{9}\Leftrightarrow x=2\)
a: \(=\dfrac{4}{3}\cdot\dfrac{32}{10}+\dfrac{8}{3}\cdot\dfrac{36}{10}-\dfrac{4}{10}\cdot\dfrac{12}{9}\)
\(=\dfrac{128}{30}+\dfrac{288}{30}-\dfrac{48}{90}=\dfrac{416}{30}-\dfrac{24}{30}=\dfrac{392}{30}=\dfrac{196}{15}\)
\(\left(48.0,75-240:10\right)-\left(16.0,5-36:9\right)\)
\(=\left(48.\dfrac{3}{4}-24\right)-\left(16.\dfrac{1}{2}-4\right)=\left(36-24\right)-\left(8-4\right)=12-4=8\)
\(\dfrac{x}{4}\) = \(\dfrac{3y}{9}\) ; \(\dfrac{x}{2}\) = \(\dfrac{2z}{10}\) ⇒ \(\dfrac{x}{4}\) = \(\dfrac{2z}{20}\)
⇒ \(\dfrac{x}{4}\) = \(\dfrac{3y}{9}\) = \(\dfrac{2z}{20}\)
Áp dụng tính chất dãy tỉ số bằng nhau ta có:
\(\dfrac{x}{4}\) = \(\dfrac{3y}{9}\) = \(\dfrac{2z}{20}\) = \(\dfrac{x+3y-2z}{4+9-20}\) = \(\dfrac{36}{-7}\)
\(x\) = - \(\dfrac{144}{7}\)
y = - \(\dfrac{144}{7}\) : 4 \(\times\) \(\dfrac{9}{3}\) = - \(\dfrac{432}{28}\)
z = - \(\dfrac{144}{7}\) : 2 \(\times\) \(\dfrac{10}{2}\) = - \(\dfrac{720}{14}\)
36 : x = 9/10
36 : x = 0,9
x = 36 : 0,9
x = 40
\(36\div x=\frac{9}{10}\)
\(x=36\div\frac{9}{10}\)
\(x=36\times\frac{10}{9}\)
\(x=40\)