Answer:

x= 15z/8

Step-by-step explanation:

[tex]2x = 3y \\ y = \frac{2x}{3} \: \: \: \: \: \: \: \: \: \: \: eqn1 \\ 4y = 5z \\ y = \frac{5z}{4} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: eqn2 \\ fom \: eqn1 \: and \: eqn2 \\ \frac{2x}{3} = \frac{5z}{4} \\ 8x = 15z \\ x = \frac{15z}{8} [/tex]