1) 2(k-12)-12(k-1) 2) -(2-a)-a+(2a+1) 3) -(k+31)+(30-3k) - вопрос №8128376121212122213313034255 от Катя15710000000 31.08.2021 16:33

Question

Алгебра: 1) 2(k-12)-12(k-1) 2) -(2-a)-a+(2a+1) 3) -(k+31)+(30-3k) 4) 2(y-+5) 5) -(3-k)+2(k-12) 6) 2(14-y)-14(2y-1) 7) -2(2-y)+3(3-y) 8) -3(1-3y)+2(2y-1) 9) -3(3c-2)+2(1-c) 10) 4(2-x)-12(1-2x) 11) -2(3-y)+3(y-2) ! !

Катя15710000000 · Answer

1) 2(k-12)-12(k-1)=2k-24-12k+12=(2k-12k)+(-24+12)=-10k+(-12)
2) -(2-a)-a+(2a+1)=-2+a-a+2a+1=3+2a
3) )-(k+31)+(30-3k)=-k-31+30-3k=-4k-1
4) 2(y-2)-(3y+5)=2y-4-3y-5=-y-9
5) -(3-k)+2(k-12)=-3+k+2k-24=3k-21
6) 2(14-y)-14(2y-1)=28-2y-28y+14=-30y+42
7) -2(2-y)+3(3-y)=-4+4y+9-3x=x+5
8) -3(1-3y)+2(2y-1)=-3+9y+4y-2=-5+13y
9) -3(3c-2)+2(1-c)=-9c+6+2-2c=-11c+8
10) 4(2-x)-12(1-2x)=8-4x-12+24x=20x-4
11) -2(3-y)+3(y-2)=-6+2y+3y-6=-12+5y