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\(\frac{x}{142}+457=625\)
\(\frac{x}{142}=168\)
\(\Rightarrow x=168.142\)
\(\Rightarrow x=23856\)
vậy \(x=23856\)
\(x-16,7+8,6=16,9\)
\(x=16,9-8,6+16,7\)
\(x=25\)
vậy \(x=25\)
\(\left(x-1\frac{3}{4}\right)x:2\frac{1}{4}=\frac{5}{3}\)
\(\left(x-\frac{7}{4}\right)x:\frac{9}{4}=\frac{5}{3}\)
\(x^2-\frac{7}{4}x=\frac{5}{3}.\frac{9}{4}\)
\(x^2-\frac{7}{4}x=\frac{15}{4}\)
\(x+\frac{15}{7}=\frac{9}{2}\)
\(x=\frac{9}{2}-\frac{15}{7}=\frac{33}{14}\)
\(x-\frac{3}{4}=\frac{7}{2}\)
\(x=\frac{7}{2}+\frac{3}{4}=\frac{17}{4}\)
\(x.\frac{7}{8}=\frac{12}{5}\)
\(x=\frac{12}{5}:\frac{7}{8}=\frac{96}{35}\)
\(\frac{5}{6}:x=\frac{4}{3}\)
\(x=\frac{5}{6}:\frac{4}{3}=\frac{5}{8}\)
- a) x=9/2-15/7=33/14
- b) x=7/2+3/4=17/4
- c) x=12/5:7/8=61/35
- d) x=5/6:4/3=5/8
- k nha
\(a)x\times\frac{4}{5}+3=12\frac{1}{4}\)
\(x\times\frac{4}{5}+3=\frac{49}{4}\)
\(x\times\frac{4}{5}=\frac{49}{4}-3\)
\(x\times\frac{4}{5}=\frac{37}{4}\)
\(x=\frac{37}{4}:\frac{4}{5}\)
\(\Rightarrow x=\frac{185}{16}\)
Ta có : \(x\div0,1-x\div4-x\times\frac{3}{4}=2,25\)
\(\Leftrightarrow x\times10-x\times\frac{1}{4}-x\times\frac{3}{4}\)
\(\Rightarrow x\times\left(10-\frac{1}{4}-\frac{3}{4}\right)=2,25\)
\(\Rightarrow x\times9=2,25\)
\(\Rightarrow x=2,25\div9=0,25\)