Выразите z через x x =2 7/9y y=0,81z

Question

Выразите z через x x =2 7/9y y=0,81z

Answer 1

X=2 7/9 y
x=25/9y
y=x:25/9
y=9/25x
y=0.81z

9/25x=0.81z
z=9/25x:0.81
z=9/25x:81/100
z=9/25*100/81 x