1/2x+3(-2z+y)-(1/3x-4y-5z)计算.

问题描述:

1/2x+3(-2z+y)-(1/3x-4y-5z)计算.

=1/2x-6z+3y-1/3x+4y+5z
=(1/2x-1/3x)+(3y+4y)+(-6z+5z)
=1/6x+7y-1z