777
Пошаговое объяснение:
4.2*(1.5a-3.4b)-1.2*(0.5a-0.3b)=6.75a-14.28b-0.6a+0.36b=6.15a-13.92b=
6.15*(-10)-13.92*(-100)=-61.5+1392=777
777
Пошаговое объяснение:
4.2*(1.5a-3.4b)-1.2*(0.5a-0.3b)=6.75a-14.28b-0.6a+0.36b=6.15a-13.92b=
6.15*(-10)-13.92*(-100)=-61.5+1392=777