Ответ:
- \(2+x+5+3x+7+7x+11=(1+3+7)x+(2+5+7+11)=11x+25\).
- \(2-x-5+3x+7-7x-11-12=(-1+3-7)x+(2-5+7-11-12)=-5x-19\).
- \(8x-9-4x+5+12x-4-5x=(8-4+12-5)x+(-9+5-4)=11x-8\).
- \(x-4+5-3x-4+3x-6=(1-3+3)x+(-4+5-4-6)=x-9\).
- \(-8x+1+4x-1+7-4x+9=(-8+4-4)x+(1-1+7+9)=-8x+16\).
- \(x+5+3x+7-2x-11-12=(1+3-2)x+(5+7-11-12)=2x-11\).
- \(-0,5x+1-3,5x+1-7,2x-1,1-1,2=(-0,5-3,5-7,2)x+(1+1-1,1-1,2)=-11,2x-0,3\).
- \(0,5x-1+3,5x+1+1,1+5,2x-1,2=(0,5+3,5+5,2)x+(-1+1+1,1-1,2)=9,2x-0,1\).
