Выражение 1)3(-2х-4)+2(3х+8)+2х= 2)-5а-5(-а+8)-14= 3)3а-(10-3а)= 4)3(-8х+4)+2(12х-8)+2х= 5)у-3у= 6)-16t+15t= 7)-15-3t+20= 8)7-2y+3y+2= 9)3/28y+3/4y= 10)-4/5b+6/15b=

1) -6x-12+6x+16+2x= 4+2x
2) -5a+5a-40-14= -54
3) 3a-10+3a= 6a-10
4) -24x+12+24x-16+2x= -4+2x
5) y-3y= -2y
6) -16t+15t= -t
7) -15-3t+20= -3t+5
8) 7-2y+3y+2= 9+y
9) 3/28y+3/4y= 3/28y+3/4y(×7) = 3/28y+21/28y= 24/28 = 6/7
10) -4/5b+6/15b = -4/5b(×3)+6/15b = -12/15b+6/15b= -6/15b = -2/5b