Question

solve the equation plzz

Answer 1

$z\frac{2}{5} = z\frac{3}{8} + \frac{7}{20} \\ \\ z\frac{2}{5 } - z\frac{3}{8} = \frac{7}{20} \\ lcm \: of \: 5 \: and \: 8 = 40 \\ z \frac{18 - 15}{40} = \frac{7}{20} \\ z \frac{3}{40} = \frac{7}{20} \\ z = \frac{7}{20} \times \frac{40}{3 } \\ z = \frac{14}{3} or \: 4.6666$