Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(\frac{2}{3}x-\frac{1}{2}=\frac{1}{10}\)
\(\frac{2}{3}x\) = \(\frac{1}{10}+\frac{1}{2}\)
\(\frac{2}{3}x\) = \(\frac{3}{5}\)
\(x\) = \(\frac{3}{5}:\frac{2}{3}\)
\(x\) = \(\frac{9}{10}\)
a.
\(\frac{4}{7}x-\frac{2}{3}=\frac{1}{5}\)
\(\frac{4}{7}x=\frac{1}{5}+\frac{2}{3}\)
\(\frac{4}{7}x=\frac{3+10}{15}\)
\(\frac{4}{7}x=\frac{13}{15}\)
\(x=\frac{13}{15}\div\frac{4}{7}\)
\(x=\frac{13}{15}\times\frac{7}{4}\)
\(x=\frac{91}{60}\)
b.
\(\frac{2}{9}+\frac{7}{8}x=\frac{1}{3}\)
\(\frac{7}{8}x=\frac{1}{3}-\frac{2}{9}\)
\(\frac{7}{8}x=\frac{3-2}{9}\)
\(\frac{7}{8}x=\frac{1}{9}\)
\(x=\frac{1}{9}\div\frac{7}{8}\)
\(x=\frac{1}{9}\times\frac{8}{7}\)
\(x=\frac{8}{63}\)
Chúc bạn học tốt
a) \(\frac{9}{20}\) c) \(\frac{-55}{4}\)
b) \(\frac{116}{75}\) d) \(\frac{-76}{45}\)
đúng hết đấy nhé mình tính kĩ lắm ko sai đâu
chúc may mắn
\(a,2\frac{x}{7}=\frac{75}{35}\)
\(\frac{75}{35}=2\frac{5}{35}=2\frac{1}{7}\)
\(\Rightarrow x=1\)
\(b,47:4=...\left(+3\right)\)
\(\Rightarrow\left(47-3\right):4=11\)
\(\Rightarrow x=11\)
\(c,\frac{112}{5}=\frac{336}{15}=22\left(+6\right)\)
\(\Rightarrow x=22\frac{x=6}{15}\)
\(d,7,5x=\frac{75x}{100}:\left(9-6\frac{13}{21}\right)=2\frac{13}{25}\)
\(\frac{75x}{100}:\left(9-\frac{139}{21}\right)=\frac{63}{25}\)
\(\frac{75x}{100}:\frac{50}{21}=\frac{63}{25}\)
\(\Rightarrow\frac{63^3}{25^{\left(1\right)}}\cdot\frac{50^{\left(2\right)}}{21^1}=6=\frac{6}{1}\)
\(\Rightarrow\frac{6}{1}=\frac{600}{100}\)
Con d sai đề
a) X-4,2=58,4-24,9
X-4,2= 33,5
X= 33,5+4,2
X=37,7
b) \(\frac{4}{5}-X=\frac{1}{5}+\frac{2}{7}\)
\(\frac{4}{5}-X=\frac{17}{35}\)
\(X=\frac{4}{5}-\frac{17}{35}\)
\(X=\frac{5}{7}\)
c)\(X-140:35=270\)
\(X-4=270\)
X=274
d) 3.X + 2.X = 25
X.(3+2) = 25
X = 25:(3+2)
X=5
a) b) \(\frac{4}{5}-x=\frac{1}{5}+\frac{2}{7}\)
x – 4,2 = 58,4 – 24,9 \(\frac{4}{5}-x=\frac{17}{35}\)
x – 4,2 = 33,5 \(x=\frac{4}{5}-\frac{17}{35}\)
x = 33,5 + 4,2 \(x=\frac{11}{35}\)
x = 37,7
c) d) \(3\times x+2\times x=25\)
x – 140 : 35 = 270 \(x\times\left(3+2\right)=25\)
x - 4 = 270 \(x\times5=25\)
x = 270 + 4 \(x=25\div5\)
x = 274 \(x=5\)