Question

(1600+t)/80=60

 

Answer 1

(1600 +t): 80=60

1600+t= 60х80

1600+t=4800 

t=4800-1600

t=3200

Answer 2

(1600+t):80=60

1600+t=60*80

1600+t=4800

t=4800-1600

t=3200.

ПРОВЕРКА:(1600+3200):80=60, 4800:80=60, 60=60.