4/9(2,7m-9n/4)-4.1(5m/7-0.5)=1.2m-n-41/10*5m/7+2.05=1.2m-205m/70-n+2.05=6m/5-205m/70- n+2.05= -121/70 -n+2.05
-121-70n+ 143.5/70=22.5-70n/70
4/9(2,7m-9n/4)-4.1(5m/7-0.5)=1.2m-n-41/10*5m/7+2.05=1.2m-205m/70-n+2.05=6m/5-205m/70- n+2.05= -121/70 -n+2.05
-121-70n+ 143.5/70=22.5-70n/70