Răspuns:
a) 14a+14b+14c+14x=14(a+b+c+x)=14(23+9)=14·32=448
b) 2013-(53a+53b+53c+10x)=2013-53·(a+b+c+x)=2013-53·(23+9)=2013-53·32=2013-1696=317
c) 349+6a+6b+6c-12x=349+6(a+b+c)-12·9=349+6·23+12*9=349+138-108=379
d) 424-21x+3a+3b+3c=424-21·9+3·(a+b+c)=424-189+3·23=235+69=304
e) 7a+7b+7c -10x = 7(a+b+c)-10·9=7·23-90=71
f) 3147-10x-(100a+100b +100c) = 3147-10·9-100(a+b+c)=3147-90-100·23=3147-90-2300=756
