а) - 5х
б) - 9а
в)26р
г) - 3.8k +3.8
д) - 0.3а
е)-16.2n
a)-9x+7x-5x+2x=-9x-5x+7x+2x=-14x+7x+2x=-5x
b)5a-6a+2a-10a=-1a+(-8a)=-9a
в)11p+2p+20p-7p=13p+14p=27p
г)-3,8k-k+3,8k+k=0
д) a+6,2a-6,5a-a=6,2a-6,5a=-0,3-6,5a
E)-18n-12n+7,3n+6,5n=-30n+13,8n=17,2n
