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\(\frac{3535}{3737}-y=\frac{2121}{7474}\)
\(y=\frac{3535}{3737}-\frac{2121}{7474}\)
\(y=\frac{49}{74}\)
a) 327 x 15 + 327 x 85
= 327 x (15+85)
= 327 x 100
= 32700
b) 405 x 250 + 750 x 405
= 405 x (250+750)
= 405 x 1000
- 405000
3535 / 3737 = 3535 / 3737 : 101 = 35 / 37 . ( 2 số đều chia cho 101 nha ) k cho mik
a) \(x+\frac{4}{5}=\frac{3}{2}\)
\(\Rightarrow x=\frac{3}{2}-\frac{4}{5}\)
\(\Rightarrow x=\frac{7}{10}\)
Vậy \(x=\frac{7}{10}.\)
b) \(x-\frac{3}{2}=\frac{11}{4}\)
\(\Rightarrow x=\frac{11}{4}+\frac{3}{2}\)
\(\Rightarrow x=\frac{17}{4}\)
Vậy \(x=\frac{17}{4}.\)
c) \(\frac{25}{3-x}=\frac{5}{6}\)
\(\Rightarrow\left(3-x\right)5=25.6\)
\(\Rightarrow15-5x=150\)
\(\Rightarrow5x=15-150\)
\(\Rightarrow5x=-135\)
\(\Rightarrow x=-135:5\)
\(\Rightarrow x=-27\)
Vậy \(x=-27.\)
a) \(\frac{3}{5}\)< \(\frac{x}{6}\)< \(\frac{4}{5}\)
\(\frac{3\times6}{5\times6}\)< \(\frac{x\times5}{6\times5}\)< \(\frac{4\times6}{5\times6}\)
\(\frac{18}{30}\)< \(\frac{x\times5}{30}\)< \(\frac{24}{30}\)
18 < X x 5 < 24 => X x 5 = 20 => X = 4
b)\(\frac{3}{5}\)< \(\frac{2}{x}\)< \(\frac{4}{5}\)
\(\frac{3\times4}{5\times4}\)< \(\frac{2\times6}{x\times6}\)< \(\frac{4\times3}{5\times3}\)
\(\frac{12}{20}\)< \(\frac{12}{x\times6}\)< \(\frac{12}{15}\)
20 > X x 6 > 15 => X x 6 = 18 => X = 3
quy đồng mẫu số:
3/5=18/30;x/6=x×5/30;4/5=24/30
vậy x×5=19;20;21
mà x là số chia hết cho 5 nên x×5=20
x=20:5=4
ĐS:4
a,3535/3737-x=2121/7474
35/37-x=21/74
x=35/37-21/74
x=49/74
b,x/1968-217/984=187/492
x/1968=187/492+217/984
x/1968=197/328
x=197.1967/328
x=????
\(\frac{3535}{3737}-x=\frac{2121}{7474}\)
\(x=\frac{3535}{3737}-\frac{2121}{7474}\)
\(x=\frac{7070}{7474}-\frac{2121}{7474}\)