若2x+3y-4=0,求9x-1•27y.

问题描述:

若2x+3y-4=0,求9x-1•27y

∵2x+3y-4=0,
∴2x+3y=4,
∴9x-1•27y=32x-2•33y=32x+3y-2=32=9.