370 Part B, C Ding do so if the number of A plus the number of 10 B to do so by 20 the number of C x

18,962,610,3982010-03-03 15:10:32 +0000 #1

four exactly equal to the number of parts to do the actual B to do a few

linjunyuan5552010-03-03 15:23:33 +0000 #2

A doing B to do a 70

100

C

D do 40 do 160

yxuranus2010-03-03 15:54:08 +0000 #3

that you are out in a 4 yuan linear equation ah, very simple