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Bài 1
\(\frac{x}{6}=\frac{4}{7}\Rightarrow7x=24\Rightarrow x=\frac{24}{7}\)
Bài 2 :
\(\left(\frac{4}{7}+\frac{8}{9}\right)-\frac{5}{9}=\frac{4}{7}+\frac{8}{9}-\frac{5}{9}\)
\(=\frac{4}{7}+\left(\frac{8}{9}-\frac{5}{9}\right)\)
\(=\frac{4}{7}+\frac{1}{3}\)
\(=\frac{19}{21}\)
a, x+4/7=7/4-1/4
x + 4/7 = 6/4
x = 6/4 - 4/7
x = 26/28
b, 9/2+(x-3/4)=25/4
x - 3/4 = 25/4 - 9/2
x - 3/4 = 7/4
x = 7/4 + 3/4
x = 10/4
a, x+4/7=7/4-1/4
x+4/7= 3/2
x = 3/2-4/7= 13/14
b,9/2+(x-3/4)=25/4
x-3/4 = 25/4 - 9/2 = 7/4
x= 7/4 + 3/4 = 5/2
a)\(x+\frac{15}{16}+\frac{7}{8}=\frac{15}{4}\)
\(x+\frac{29}{16}=\frac{15}{4}\)
\(x=\frac{15}{4}-\frac{29}{16}\)
\(x=\frac{31}{16}\)
b)\(x-\frac{27}{28}-\frac{9}{14}=\frac{13}{7}\)
\(x-\frac{45}{28}=\frac{13}{7}\)
\(x=\frac{13}{7}+\frac{45}{28}\)
\(x=\frac{97}{28}\)
c)\(x\times\frac{1}{5}+x+\frac{1}{6}=\frac{2}{3}\)
\(x\times\frac{1}{5}+x=\frac{2}{3}-\frac{1}{6}\)
\(x\times\left(\frac{1}{5}+1\right)=\frac{1}{2}\)
\(x\times\frac{6}{5}=\frac{1}{2}\)
\(x=\frac{1}{2}:\frac{6}{5}\)
\(x=\frac{5}{12}\)
d)\(x:14=\frac{1}{4}+\frac{2}{9}+\frac{3}{4}\)
\(x:14=\frac{11}{9}\)
\(x=\frac{11}{9}\times14\)
\(x=\frac{154}{9}\)
#H
a,Ta có \(\frac{x}{6}=\frac{2}{3}\)
\(\Rightarrow3x=12\Rightarrow x=4\)
Vậy x = 4
b, \(\left(\frac{4}{7}+\frac{8}{9}\right)-\frac{5}{9}=\frac{4}{7}+\frac{8}{9}-\frac{5}{9}\)
\(=\frac{4}{7}+\left(\frac{8}{9}-\frac{5}{9}\right)\)
\(=\frac{4}{7}+\frac{1}{3}\)
\(=\frac{19}{21}\)
Bài 1 mình nhầm. x phần 6 = 4 phần 7 mới đúng. Cảm ơn bạn nhé
Bài 3 :
Cách 1 :
( \(\frac{7}{9}\)+\(\frac{5}{6}\)) x \(\frac{3}{5}\)
= \(\frac{29}{18}\)x\(\frac{3}{5}\)
= \(\frac{29}{30}\)
Cách 2 :
( \(\frac{7}{9}\)+\(\frac{5}{6}\)) x \(\frac{3}{5}\)
= \(\frac{7}{9}\)x \(\frac{3}{5}\)+\(\frac{5}{6}\)x\(\frac{3}{5}\)
= \(\frac{7}{15}\)+\(\frac{1}{2}\)
= \(\frac{29}{30}\)
Bài 1 :
X x \(\frac{3}{7}\)=\(\frac{9}{14}\)
X = \(\frac{9}{14}\):\(\frac{3}{7}\)
X = \(\frac{3}{14}\)
Vậy X = \(\frac{3}{14}\)
X : \(\frac{5}{9}\)=\(\frac{3}{10}\)
X = \(\frac{3}{10}\)x\(\frac{5}{9}\)
X = \(\frac{1}{6}\)
Vậy X = \(\frac{1}{6}\)
7/9 * x = 4/9
x = 4/9 : 7/9
x = 4/7