a) x + 5/7 = 5/4 + 1/2
suy ra x + 5/7 = 7/4
suy ra x= 7/4 - 5/7
suy ra x= 29/28
a) \(x+\frac{5}{7}-\frac{1}{2}=\frac{5}{4}\)
\(x+\frac{5}{7}=\frac{5}{4}+\frac{1}{2}\)
\(x+\frac{5}{7}=\frac{7}{4}\)
\(x=\frac{7}{4}-\frac{5}{7}\)
\(x=\frac{29}{28}\)
a, x + \(\frac{5}{7}\)- \(\frac{1}{2}\)= \(\frac{5}{4}\)
x + \(\frac{5}{7}\) = \(\frac{5}{4}\)+ \(\frac{1}{2}\)
x + \(\frac{5}{7}\) = \(\frac{7}{4}\)
x = \(\frac{7}{4}\)- \(\frac{5}{7}\)
x = \(\frac{29}{28}\)
b, x - \(\frac{5}{7}\)+ \(\frac{1}{2}\)= \(\frac{5}{4}\)
x - \(\frac{5}{7}\) = \(\frac{5}{4}\)- \(\frac{1}{2}\)
x - \(\frac{5}{7}\) = \(\frac{3}{4}\)
a)\(x+\frac{5}{7}-\frac{1}{2}=\frac{5}{4}\)
\(\Rightarrow x+\frac{5}{7}=\frac{5}{4}+\frac{1}{2}\)
\(\Rightarrow x+\frac{5}{7}=\frac{7}{4}\)
\(\Rightarrow x=\frac{7}{4}-\frac{5}{7}\)
\(\Rightarrow x=\frac{29}{28}\)
Vậy x=.......
b)\(x-\frac{5}{7}+\frac{1}{2}=\frac{5}{4}\)
\(\Rightarrow x-\frac{5}{7}=\frac{5}{4}-\frac{1}{2}\)
\(\Rightarrow x-\frac{5}{7}=\frac{3}{4}\)
\(\Rightarrow x-\frac{5}{7}=\frac{41}{28}\)
Vậy x=...........