1) X+(X+1)+(X+2)=9; (Z-2)+(z-1)=-3; 21+(20-4x)-(11-1x)=0. 2) 2u-3(7-2u)=3; 12-y=5(4-2y)+10; 2-2(x-8)=4x-4. 3) 3-5/7t=1-3/7t; 1/8u-2=5/8u+1; 2/5z-7=3.

Question

1) X+(X+1)+(X+2)=9; (Z-2)+(z-1)=-3; 21+(20-4x)-(11-1x)=0. 2) 2u-3(7-2u)=3; 12-y=5(4-2y)+10; 2-2(x-8)=4x-4. 3) 3-5/7t=1-3/7t; 1/8u-2=5/8u+1; 2/5z-7=3.

Гость

Ответ(ы) на вопрос:

Accepted Answer

1)1.3x+3=9 3x=6 x=2 2.(z-2)+(z-1)=-3 2z-3=-3 2z=0 z=0 3.21+(20-4x)-(11-1x)=0 21+20-4х-11+1х=0 30-3х=0 -3х=-30 х=10 2) 1.2u-21+6u=3 3u=24 u=8 2. 12-y=20-10y+10 -y+10y=-12+20+10 9y=18 y=2 3.2-2x+16=4x-4 -2x-4x=-2-16-4 -6x=-22 x=22/6=11/3 3) 1. 3-5/7t=1-3/7t 3-5/7t-1+3/7t=0 2/7t=0 t=o 2. 1/8u-2=5/8u+1 1/8u-2-5/8u-1=o -3+4/8u=o 4/8u=3 u=24/4=6 3. 2/5z=3 z=3/2/5=15/2=7,5