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\(\frac{3}{5}+\frac{2}{5}:x=\frac{4}{5}\)
\(=>\frac{2}{5}:x=\frac{4}{5}-\frac{3}{5}\)
\(=>\frac{2}{5}:x=\frac{1}{5}\)
\(=>x=\frac{2}{5}:\frac{1}{5}\)
\(=>x=2\)
Vậy x = 2
6 2/7 + 7 3/5 + 8 6/9 + 9 1/4 + 2/5 + 5/7 + 1/3 x 3/4 + 1967
= 44/7 + 38/5 + 78/9 + 37/4 + 2/5 + 5/7 + 1/3 + 1967
= ( 44/7 + 5/7 ) + ( 38/5 + 2/5 ) + ( 26/3 + 1/3 ) + ( 37/4 + 3/4 ) +1967
= 7 + 8 + 9 + 10 + 1967
= 15 + 9 + 10 + 1967
= 24 + 10 + 1967
= 34 + 1967
= 2001
a) \(x\times\frac{5}{7}=\frac{1}{4}+\frac{1}{5}\)
\(x\times\frac{5}{7}=\frac{9}{20}\)
\(x=\frac{9}{20}\div\frac{5}{7}\)
\(x=\frac{63}{100}\)
a(2) : \(2\frac{3}{3}\div x=\frac{2}{5}-\frac{1}{3}\)
\(\frac{9}{3}\div x=\frac{1}{15}\)
\(x=\frac{9}{3}\div\frac{1}{15}\)
\(x=45\)
x : 1/2 + 5/6 = 3/2
x : 1/2 = 2/3
x = 2/3 . 1/2
x = 1/3
hok tốt
\(\frac{x}{2}+\frac{x}{3}+\frac{x}{4}=25\)
\(x\times\left(\frac{1}{2}+\frac{1}{3}+\frac{1}{4}\right)=25\)
\(x\times\frac{13}{12}=25\)
\(x=25:\frac{13}{12}\)
x = 300/13
\(x\div2+x\div3+x\div4=25\)
\(x\div\left(2+3+4\right)=25\)
\(x\div9=25\)
\(x=25\times9\)
\(x=225\).
__Các ARMY đi qua cho mk xin cái k !__
\(\frac{4}{3}+\frac{1}{3}:x=\frac{5}{2}\)
\(\frac{1}{3}:x=\frac{5}{2}-\frac{4}{3}\)
\(\frac{1}{3}:x=\frac{7}{6}\)
\(x=\frac{1}{3}:\frac{7}{6}\)
\(x=\frac{2}{7}\)
4/3 + 1/3 : x = 5/2
5/3 : x = 5/2
x = 5/2 x 5/3
x = 25/6
Ko chắc chắn
Hok tốt !
# MissyGirl #