Пошаговое объяснение:
-4х-8,9*(9-2х)=-4х-80,1+17,8х=13,8х-80,1
1/3*(12-2,1y)+0.3y=4-0.7y+0.3y=4-0.4y
6*(3x-2)+4*(5x-1)=18x-12+20x-4=38x-16
-7*(3-4c)+14*(0.5+2c)=-21+28c+7+28c=56c-14
3*(2.1x-y)-2.8*(2x-3y)=6.2x-3y-5.6x+8.4y=0.6x+5.4y
0.4*(8t+7)-1.6*(2t-3)=3.2t+2.8-3.2t+4.8=7.6
Пошаговое объяснение:
-4х-8,9*(9-2х)=-4х-80,1+17,8х=13,8х-80,1
1/3*(12-2,1y)+0.3y=4-0.7y+0.3y=4-0.4y
6*(3x-2)+4*(5x-1)=18x-12+20x-4=38x-16
-7*(3-4c)+14*(0.5+2c)=-21+28c+7+28c=56c-14
3*(2.1x-y)-2.8*(2x-3y)=6.2x-3y-5.6x+8.4y=0.6x+5.4y
0.4*(8t+7)-1.6*(2t-3)=3.2t+2.8-3.2t+4.8=7.6