Решите: (720-t*6):9=60 и 4*(250:а+12)=68

1) (720-t*6):9=60

720-t*6 = 540;

t*6 = 720 - 540 = 180;

t = 30;

2) 4*(250:а+12)=68

250:a + 12 = 17;

250:a = 5;

a = 250:5 = 50;