(720-t*6):9=60 уравнение

Question

(720-t*6):9=60 уравнение

Answer 1

(720-t*6):9=60
720-t*6=60*9
720-t*6=540
t*6=720-540
t*6=180
t=180:6
t=30
(720-30*6):9=60
60=60

Answer 2

720-t*6=540

t*6=180

t=30