Question

Помогите даю 30 баллoв!!!!!!!!!!!!!!!!!!!!

Answer 1

$3.\\-4m-(2m-3)+(m-1,5)=-4m-2m+3+m-1,5=-5m+1,5\\\\\\4.\\1)\;-4\cdot(3+m-k)=-12-4m+4k;\\2)\;-(9+x)+y=-9-x+y;\\3)\;30+(-c-b)=30-c-b;\\4)\;3y-(1+x)=3y-1-x;\\5)\;(a+7)-(y-x)=a+7-y+x;\\8)\;-16+(a-b)=-16+a-b.$