D
依题意得可列出方程①、(36-2x)(20-x)=96×6;
②、20x×2+36×x+96×6=36×20;即2×20x+(36-2x)x=36×20-96×6;
③、将方程①两边同除4可得:(18x-x)(10-
)=
×96×6;
∴正确的为①、②、③,
故选D.
D
依题意得可列出方程①、(36-2x)(20-x)=96×6;
②、20x×2+36×x+96×6=36×20;即2×20x+(36-2x)x=36×20-96×6;
③、将方程①两边同除4可得:(18x-x)(10-
)=
×96×6;
∴正确的为①、②、③,
故选D.