a, \(\frac{2}{5}\)+ y = 1
y = 1 - \(\frac{2}{5}\)
y = \(\frac{3}{5}\)
b, \(\frac{6}{8}\)- y = \(\frac{3}{5}\)
y = \(\frac{6}{8}\)- \(\frac{3}{5}\)
y = \(\frac{3}{20}\)
c, y : 6 = \(\frac{7}{4}\)
y = \(\frac{7}{4}\)x 6
y = \(\frac{21}{2}\)
d, y - \(\frac{1}{3}\)= 5 x \(\frac{2}{3}\)
y - \(\frac{1}{3}\)= \(\frac{10}{3}\)
y = \(\frac{10}{3}\)+ \(\frac{1}{3}\)
y = \(\frac{11}{3}\)
a,2/5 + y = 1
y = 1 - 2/5
y = 3/5
b, 6/8 - y = 3/5
y = 6/8 - 3/5
y = 3/10
c, y / 6 = 7/4
y = 7/4 * 6
y = 15/2
d, y - 1/3 = 5 * 2/3
y - 1/3 = 10/3
y = 10/3 + 1/3
y = 11/3
a ,\(\frac{2}{5}+y=1\)
\(y=1-\frac{2}{5}\)
\(y=\frac{3}{5}\)
b ,\(\frac{6}{8}-y=\frac{3}{5}\)
\(y=\frac{6}{8}-\frac{3}{5}\)
\(y=\frac{6}{40}\)
c,\(\frac{y}{6}=\frac{7}{4}\)
\(=>y=14\)
\(\frac{y}{6}=\frac{7}{4}\)
d,\(y-\frac{1}{3}=5\cdot\frac{2}{3}\)
\(y-\frac{1}{3}=\frac{7}{3}\)
\(y=\frac{7}{3}-\frac{1}{3}\)
\(y=\frac{6}{3}=2\)
Hok tốt#