Tìm x, biết
\(\frac{x}{5}=\frac{5}{6}+\frac{_{_{-19}}}{30}\)
\(\frac{x}{5}=\frac{5}{6}+\frac{-19}{30}\)
\(x=\frac{1}{2}+\frac{-2}{3}\)
\(\frac{x}{30}=\frac{3}{5}+\frac{7}{30}\)
Đề bài: Tìm x biết:
1,x/5=5/6+-19/30
x/5=25/30+-19/30
x/5=6/30
x/5=1/5 =>x=1
2, x=1/2+-2/3
x=3/6+-4/6
x=-1/6
3, x/30=3/5+7/30
x/30=18/30+7/30
x/30=25/30 => x=25
May Mắn
Tìm x biết:
\(\frac{x}{5}=\frac{5}{6}.\frac{-30}{19}\)
TÌM X BIẾT :
a)X=\(\frac{-1}{2}\)+\(\frac{3}{4}\)
b)\(\frac{X}{5}\)=\(\frac{5}{6}\)+\(\frac{-19}{30}\)
a) \(X=\frac{-1}{2}+\frac{3}{4}\)
\(\Leftrightarrow X=\frac{-2}{4}+\frac{3}{4}\)
\(\Leftrightarrow X=\frac{1}{4}\)
b) \(\frac{X}{5}=\frac{5}{6}+\frac{-19}{30}\)
\(\Leftrightarrow\frac{X}{5}=\frac{25}{30}+\frac{-19}{30}\)
\(\Leftrightarrow\frac{X}{5}=\frac{6}{30}=\frac{1}{5}\)
\(\Leftrightarrow X=1\)
Đáp số: a) \(X=\frac{1}{4}\)
b) \(X=1\)
Tìm x, biết:
a)x=\(\frac{-1}{2}+\frac{3}{4}\)
b)\(\frac{x}{5}=\frac{5}{6}+\frac{-19}{30}\)
a)x=-2/4+3/4=1/4
b)x/5=25/30+-19/30=6/30=1/5=>x=1.
THAM KHẢO NHÉ
CHÚC BN HỌC TỐT
a)x\(=\frac{-1}{2}+\frac{3}{4}=\frac{-2}{4}+\frac{3}{4}=\frac{-2+3}{4}=\frac{1}{4}\)
b) Ta có: \(\frac{5}{6}+\frac{-19}{30}=\frac{25}{30}+\frac{-19}{30}=\frac{25-19}{30}=\frac{6}{30}=\frac{1}{5}\)
Vậy,\(\frac{x}{5}=\frac{1}{5}\)⇒\(x=1\)
Tìm x
a) \(\frac{x}{5}=\frac{5}{6}+\frac{-19}{30}\)
b) \(\frac{9}{x}=\frac{2}{5}+\frac{7}{20}\)
a)\(\frac{x}{5}=\frac{25}{30}+\frac{-19}{30}=\frac{6}{30}=\frac{1}{5}\Rightarrow x=1\)
b)\(\frac{9}{x}=\frac{8}{20}+\frac{7}{20}=\frac{15}{20}=\frac{3}{4}=\frac{9}{12}\Rightarrow x=12\)
\(\frac{x}{5}=\frac{5}{6}+\frac{-19}{30}\)
x/5 = 5/6 + -19/ 30
=> x/5 = 25/30 + -19/30
=> x/5 = 6/30
=> x/5 = 1/5
=> x = 1 ( vì mẫu số = 5 )
Vậy x = 1
Chúc bạn học giỏi !!!
\(\frac{x}{5}=\frac{5}{6}+-\frac{19}{30}\)
\(\Rightarrow\frac{x}{5}=\frac{1}{5}\)
\(\Rightarrow x=1\)
học tốt ~~~~
\(\frac{x}{5}=\frac{5}{6}+\frac{-19}{30}\)
\(\Rightarrow\frac{x}{5}=\frac{25-19}{30}\)
\(\Rightarrow\frac{x}{5}=\frac{6}{30}\)
\(\Rightarrow\frac{x}{5}=\frac{1}{5}\)
\(\Rightarrow x=1\)
a, tính:\(\frac{5.4^{15}.9^9-4.3^{20}.8^9}{5.2^9.6^{19}-7.2^{29}.27^6}\)
b, tìm x biết:\(1\frac{1}{30}:(24\frac{1}{6}-24\frac{1}{5})-\frac{1\frac{1}{2}-\frac{3}{4}}{4x-\frac{1}{2}}=(-1\frac{1}{5}):(8\frac{1}{5}-8\frac{1}{3})\)
Tìm x biết:
a.
\(\frac{1}{4}.\frac{2}{6}.\frac{3}{8}.\frac{4}{10}.\frac{5}{12}...\frac{30}{62}.\frac{31}{64}=2^x\)
b.
\(\frac{4^5+4^5+4^5+4^5}{3^5+3^5+3^5}.\frac{6^5+6^5+6^5+6^5+6^5+6^5}{2^5+2^5}=2^x\)
\(\frac{1}{4}\cdot\frac{2}{6}\cdot\frac{3}{8}\cdot\frac{4}{10}\cdot....\cdot\frac{30}{62}\cdot\frac{31}{64}=2^x\)
\(\Leftrightarrow\frac{1}{2}\left(\frac{1}{2}\cdot\frac{2}{3}\cdot\frac{3}{4}\cdot.....\cdot\frac{30}{31}\cdot\frac{31}{32}\right)=2^x\)
\(\Leftrightarrow\frac{1}{32}=2^{x+1}\)
Làm nốt.
ko làm được câu này hay câu b ib với tớ nha.khẳng định tối giải.
Tìm x, biết:
\(x=\left(2-\frac{5}{3}+\frac{7}{6}-\frac{9}{10}+\frac{11}{15}-\frac{13}{21}+\frac{15}{28}-\frac{17}{36}+\frac{19}{45}\right)\times\frac{5}{3}\)