Tìm x:
a, 4/5 * 8/3 * x/7 = 96/105 b, 7/4 * 3/x * 11/5 = 231/200
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a)\(\frac{4}{5}\cdot\frac{8}{3}\cdot\frac{x}{7}=\frac{96}{105}\)
\(\frac{4}{5}\cdot\frac{8}{3}\cdot\frac{x}{7}=\frac{32}{35}\)
\(\frac{4\cdot8\cdot x}{5\cdot3\cdot7}=\frac{32}{35}\)
\(\frac{32\cdot x}{105}=\frac{32}{35}\)
\(\Rightarrow32\cdot x\cdot35=32\cdot105\)( chỗ này là nhân tích chéo nha )
\(\Rightarrow x\cdot35=105\)
\(x=105:35\)
\(x=3\)Vậy x=3
b)\(\frac{7}{4}\cdot\frac{3}{x}\cdot\frac{11}{5}=\frac{231}{200}\)
\(\frac{7\cdot3\cdot11}{4\cdot x\cdot5}=\frac{231}{200}\)
\(\frac{231}{20\cdot x}=\frac{231}{200}\)
\(\Rightarrow20\cdot x=200\)
\(x=200:20\)
\(x=10\)Vậy x=10
a) \(\frac{4}{5}\times\frac{8}{3}\times\frac{x}{7}=\frac{96}{105}\)
\(\frac{32}{15}\times\frac{x}{7}=\frac{32}{35}\)
\(\frac{x}{7}=\frac{32}{35}:\frac{32}{15}\)
\(\frac{x}{7}=\frac{3}{7}\)
\(\Rightarrow x=3\)
b) \(\frac{7}{4}\times\frac{3}{x}\times\frac{11}{5}=\frac{231}{200}\)
\(\frac{7}{4}\times\frac{11}{5}\times\frac{3}{x}=\frac{231}{200}\)
\(\frac{77}{20}\times\frac{3}{x}=\frac{231}{200}\)
\(\frac{3}{x}=\frac{231}{200}:\frac{77}{20}\)
\(\frac{3}{x}=\frac{3}{10}\)
\(\Rightarrow x=10\)
CHÚC BẠN HỌC TỐT!!!!!!!!!!
a)\(\frac{4}{5}\times\frac{8}{3}\times\frac{x}{7}=\frac{96}{105}\)
\(\frac{x}{7}=\frac{96}{105}:\frac{4}{5}:\frac{8}{3}=\frac{3}{7}\)
\(x=3\)
b) \(\frac{7}{4}\times\frac{3}{x}\times\frac{11}{5}=\frac{231}{200}\)
\(\frac{3}{x}=\frac{231}{200}:\frac{7}{4}:\frac{11}{5}=\frac{3}{10}\)
\(x=10\)
\(-\frac{1}{10}< =x< =\frac{3}{5}\)
\(\frac{-4}{9}< x< =\frac{2}{3}\)
\(a)5-\left(x-6\right)=4\left(3-2x\right)\)
\(\Leftrightarrow5-x+6=12-8x\)
\(\Leftrightarrow-x+8x=12-5-6\)
\(\Leftrightarrow7x=1\Leftrightarrow x=\frac{1}{7}\)
a) 5-(x-6)=4(3-2x)
<=>5-x-6=12-8x
<=>-x+8x=2-5-6
<=>7x=1
<=>x=1/7
x:8/11=11/3
x=11/3X8/11
x=8/3
b) 2/5:x=1/4
x=2/5:1/4
x=8/5
c)4/5+5/7:x=1/6=?
ai tích mình tích lại
A. \(\frac{4}{5}\times\frac{8}{3}\times\frac{x}{7}=\frac{96}{105}\)
=\(\frac{4}{5}\times\left(\frac{8}{3}\times\frac{x}{7}\right)=\frac{96}{105}\)
= \(\frac{8}{3}\times\frac{x}{7}=\frac{96}{105}\div\frac{4}{5}\)
= \(\frac{8}{3}\times\frac{x}{7}=\frac{480}{420}=\frac{8}{7}\)
=\(\frac{x}{7}=\frac{8}{7}\div\frac{8}{3}\)
= \(X=\frac{24}{56}=\frac{3}{7}\)
\(X=3\)
@Moon