Упростите выражения: 15 + ( n - 18)= -(8-x) - x= (x - 4) - (x+5)= -(у - а -3) - (4+а)= -(16 - b + c) + (8+c)=

15 + ( n - 18)=15+n-18=n-3 -(8-x) - x=-8+x-x=-8 (x - 4) - (x+5)=x-4-x-5=-9 -(у - а -3) - (4+а)=-y+a+3-4-a=-y-1 -(16 - b + c) + (8+c)=-16+b-c+8+c=b-8