4545-3(x-2)=12
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b) 375x203= 76125
4545:15= 303
mk ko đặt tính dc vì hình như olm ko có cn đó
k mk nhé
\(\frac{2}{15}+\frac{2}{3}=\frac{2}{15}+\frac{10}{15}=\frac{12}{15}\)
\(\frac{8}{5}-\frac{8}{12}=\frac{96}{60}-\frac{40}{60}=\frac{56}{60}\)
B) Mik ko biết bởi vì hình như olm ko có đặt tính đc
Hk tốt
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a) \(\frac{270}{-450}+\frac{4545}{5454}=-\frac{3}{5}+\frac{5}{6}=\frac{7}{30}\)
b) \(\frac{-33}{429}+\frac{-156}{-26}+\frac{224}{-84}=\frac{-1}{13}+6+\frac{-56}{21}=\frac{127}{39}\)
c) \(\frac{405}{-567}+\frac{-161}{552}+\frac{162}{-243}=-\frac{5}{7}+\frac{-7}{24}+\frac{-2}{3}=\frac{-281}{168}\)
d) \(-\frac{2}{3}\left(\frac{2}{18}+\frac{-6}{12}-\frac{3}{33}\right)=-\frac{2}{3}\left(\frac{1}{9}+\frac{-1}{2}-\frac{1}{11}\right)\)
\(=-\frac{2}{3}.\left(-\frac{95}{198}\right)=\frac{95}{297}\)
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2 - x = 1/5 : 1/4
2 - x = 1/5 * 4
2 - x = 4/5
x = 2 - 4/5
x = 6/5
3 - x = 1/3 : 1/6
3 - x = 1/3 * 6
3 - x = 2
x = 3 - 2
x = 1
b) 1/3 * 1/2 + 1/5 * 1/2
= 1/2 * (1/3 + 1/5)
= 1/2 * 8/15
= 4/15
373737/414141 : 4545/4141
= 37/41 : 45/41
= 37/41 * 41/45
= 37/45
2727/4242 + 13/42 + 444444/424242
= 9/14 + 13/42 + 22/21
= 2
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2 - x = \(\frac{1}{5}\): \(\frac{1}{4}\)
2 -x = \(\frac{4}{5}\)
x = 2 - \(\frac{4}{5}\)
x = \(\frac{6}{5}\)
3 - x \(\times\) \(\frac{1}{3}\)= \(\frac{1}{6}\) \(\Rightarrow\) 3 - x = \(\frac{1}{6}\) \(\div\frac{1}{3}\)
3 - x = \(\frac{1}{2}\) \(\Rightarrow\) x = 3 - \(\frac{1}{2}\) \(\Rightarrow\) x = \(\frac{5}{2}\)
\(4545-3\left(x-2\right)=12\\ \Rightarrow3\left(x-2\right)=4533\\ \Rightarrow x-2=1511\\ \Rightarrow x=1513\)
\(4545-3\left(x-2\right)=12\)
\(\Rightarrow3\left(x-2\right)=4545-12\)
\(\Rightarrow3\left(x-2\right)=4533\)
\(\Rightarrow x-2=1511\)
\(\Rightarrow x=1511+2\)
\(\Rightarrow x=1513\)