\(\frac{5}{9}\)+x-7\(\frac{7}{18}\)):15
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22 tháng 7 2015

\(\Rightarrow\left(14\frac{5}{9}+x-7\frac{7}{18}\right):15\frac{2}{3}=1\Rightarrow\left(\frac{43}{6}+x\right)=\frac{47}{3}\Rightarrow x=\frac{17}{2}\)

4 tháng 6 2018

\(2009-\left(4\frac{5}{9}+x-7\frac{7}{18}\right):15\frac{2}{3}=2008\)

\(2009-\left(\frac{41}{9}+x-\frac{133}{18}\right):\frac{47}{3}=2008\)

\(\left(\frac{41}{9}+x-\frac{133}{18}\right):\frac{47}{3}=2009-2008\)

\(\left(\frac{41}{9}+x-\frac{133}{18}\right):\frac{47}{3}=1\)

\(\frac{41}{9}+x-\frac{133}{18}=1\cdot\frac{47}{3}\)

\(\frac{41}{9}+x-\frac{133}{18}=\frac{47}{3}\)

\(\frac{41}{9}+x=\frac{133}{18}+\frac{47}{3}\)

\(\frac{41}{9}+x=\frac{415}{18}\)

               \(x=\frac{415}{18}-\frac{41}{9}\)

                \(x=\frac{37}{2}\)

\(2009-\left(4\frac{5}{9}+x-7\frac{7}{18}\right)\div15\frac{2}{3}=2008\)

\(\left(4\frac{5}{9}+x-7\frac{7}{18}\right)\div15\frac{2}{3}=2009-2008\)

\(\left(-3\frac{3}{18}+x\right)\div15\frac{2}{3}=1\)

\(-3\frac{3}{18}+x=15\frac{2}{3}\)

\(x=15\frac{2}{3}+3\frac{3}{18}\)

\(x=15\frac{12}{18}+3\frac{3}{18}\)

\(x=18\frac{15}{18}\)

exactly 100%

22 tháng 10 2017

a, 6/9+5/7+1/3=2/3+5/7+1/3=5/7+1=12/7

b, 17/7+6/5-20/14=17/7+6/5-10/7=6/5+1=11/5

c,2/5x1/4+3/4x2/5=2/5x(1/4+3/4)=2/5x1=2/5

d, 6/11:4/6+5/11:2/3=6/11:2/3+5/11:2/3=(6/11+5/11):2/3=3/2

nha

13 tháng 9 2017

\(x+\frac{15}{7}=\frac{9}{2}\)

\(x=\frac{9}{2}-\frac{15}{7}=\frac{33}{14}\)

\(x-\frac{3}{4}=\frac{7}{2}\)

\(x=\frac{7}{2}+\frac{3}{4}=\frac{17}{4}\)

\(x.\frac{7}{8}=\frac{12}{5}\)

\(x=\frac{12}{5}:\frac{7}{8}=\frac{96}{35}\)

\(\frac{5}{6}:x=\frac{4}{3}\)

\(x=\frac{5}{6}:\frac{4}{3}=\frac{5}{8}\)

13 tháng 9 2017
  • a) x=9/2-15/7=33/14
  • b) x=7/2+3/4=17/4
  • c) x=12/5:7/8=61/35
  • d) x=5/6:4/3=5/8
  • k nha

\(\frac{7}{3}:\frac{5}{x}=\frac{14}{15}\)

\(\frac{5}{x}=\frac{7}{3}:\frac{14}{15}\)

\(\frac{5}{x}=\frac{5}{2}\)=> x = 2

14 tháng 7 2018

\(\frac{7}{3}:\frac{5}{x}=\frac{14}{15}\)

\(\Rightarrow\frac{5}{x}=\frac{7}{3}:\frac{14}{15}\)

\(\Rightarrow\frac{5}{x}=\frac{5}{2}\)

\(\Rightarrow x=2\)

Vậy x = 2

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