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a) \(\frac{3}{2}-\frac{5}{6}:x=\frac{5}{15}-\frac{3}{15}\)
\(\Leftrightarrow\frac{3}{2}-\frac{5}{6}:x=\frac{2}{15}\)
\(\Leftrightarrow\frac{5}{6}:x=\frac{3}{2}-\frac{2}{15}\)
\(\Leftrightarrow\frac{5}{6}:x=\frac{41}{30}\)
\(\Leftrightarrow x=\frac{5}{6}:\frac{41}{30}\)
\(\Leftrightarrow x=\frac{25}{41}\)
b) \(x-\frac{6}{7}.\frac{14}{8}=\frac{1}{2}-\frac{2}{5}\)
\(\Leftrightarrow x-\frac{3}{2}=\frac{1}{10}\)
\(\Leftrightarrow x=\frac{1}{10}+\frac{3}{2}\)
\(\Leftrightarrow x=\frac{8}{5}\)
c) \(x:\frac{6}{5}+\frac{2}{3}=\frac{7}{3}\)
\(\Leftrightarrow x:\frac{6}{5}=\frac{7}{3}-\frac{2}{3}\)
\(\Leftrightarrow x:\frac{6}{5}=\frac{5}{3}\)
\(\Leftrightarrow x=\frac{5}{3}.\frac{6}{5}\)
\(\Leftrightarrow x=2\)
6/7-1/3+x=5/3
11/21+x =5/3
x =5/3-11/21
x =8/7
vậy x=8/7
kb tích mk nha
\(\frac{6}{7}-\frac{1}{3}+x=\frac{5}{3}\)
\(\frac{18}{21}-\frac{7}{21}+x=\frac{5}{3}\)
\(\frac{11}{21}+x=\frac{5}{3}\)
\(x=\frac{11}{21}-\frac{5}{3}\)
\(x=-\frac{24}{21}\)
\(Kochắcchắn\)
Hk tốt
# MissyGirl #
\(\frac{7}{9}\cdot\frac{3}{5}-x=\frac{1}{4}\)
\(=\frac{7}{15}-x=\frac{1}{4}\)
\(x=\frac{7}{15}-\frac{1}{4}\)
\(x=\frac{13}{60}\)
\(\frac{7}{4}-x.\frac{3}{4}=\frac{5}{19}\)
\(\Rightarrow1+\frac{3}{4}-x.\frac{3}{4}=\frac{5}{9}\)
\(\Rightarrow\frac{3}{4}.\left(1-x\right)=\frac{5}{9}-1=-\frac{4}{9}\)
\(\Rightarrow1-x=-\frac{4}{9}:\frac{3}{4}=-\frac{16}{27}\)
\(\Rightarrow x=1-\left(-\frac{16}{27}\right)=1+\frac{16}{27}=1\frac{16}{27}\)
9/2 - 1/6 . x = 3/12
-> 1/6 . x = 9/2 - 3/12
-> 1/6 . x = 17/4
-> x = 17/4 : 1/6
-> x = 51/2
Đề là tìm x?
\(x-\frac{4}{5}:\frac{2}{7}=\frac{8}{35}\)
\(x-\frac{4}{5}\times\frac{7}{2}=\frac{8}{35}\)
\(x-\frac{4\times7}{5\times2}=\frac{8}{35}\)
\(x-\frac{28}{10}=\frac{8}{35}\)
\(x=\frac{8}{35}+\frac{28}{10}\)
\(x=\frac{16}{70}+\frac{196}{70}\)
\(x=\frac{16+196}{70}\)
\(x=\frac{212}{70}=\frac{106}{35}\)
Vậy x = 106/35
\(x-\frac{4}{5}:\frac{2}{7}=\frac{8}{35}\)
\(x-\frac{4}{5}x\frac{7}{2}=\frac{8}{35}\)
\(x-\frac{14}{5}=\frac{8}{35}\)
\(x=\frac{8}{35}+\frac{14}{5}\)
\(x=\frac{8}{35}+\frac{89}{35}\)
\(x=\frac{97}{35}\)
# Chúc bạn học tốt #
-12.(x-5)+7.(3-x)=5
=> (-12x)-(-60)+21-7x=5
=> (-12x)+60+21-7x =5
=> (-12x)+81-7x =5
=> (-12x)-7x =5-81
=> x.(-12-7) =-76
=> x.(-19) =-76
=> x =(-76):(-19)
=> x =4
Vậy x=4
-12( x - 5 ) + 7( 3 - x ) = 5