Ответ:
1283.
a) -9x+7x-5x+2x=-5x
б)5a-6a+2a-10a=-9a
в)11p+2p+20p-7p=26p
г)-3,8k-k+.38k+k=0
д)a+6.2a-65.a-a=0.3a
е)-18n-12n+7.3n+6.5n=-16.2n
ж)2/9n+2/9n-3/9n-5/9n=-2/9n
з)2/3a-1/6a+1/2a-1/12a=8/12a-2/12a+6/12a-1/12a=1/12a
и)b+0.4b-1/5b-1/2b=b+0.4b-0.2b-0.5b=0.7b