Question

Please answer 5 and 6 questions ​

Answer 1

5.

$\frac{0.4z - 3}{1.5z + 9 } = - \frac{5}{7}$

$2.8z - 21 = - 7.5z - 45$

$2.8z + 7.5z = 21 - 45$

$10.3z = - 24$

$z = - \frac{240}{103}$

$z = 2.3$