30×(х×6)=189.720 3.438+х÷6=10.004 (800-180)÷х=20 ДАЮ 30 БАЛОВ!!!!!

30*(x*6)=189.720
x*6=189720:30
x*6=6324
x=6324:6
x=1054

3.438+x:6=10004
x:6=10004-3438
x:6=6566
x=6566*6
x=39396

(800-180):x=20
620:x=20
x=620:20
x=31

спосибо!!!!!!