化简x+{3y-[2y-(2x-3y)]}=_.
问题描述:
化简x+{3y-[2y-(2x-3y)]}=______.
答
原式=x+{3y-[2y-2x+3y]},
=x+{3y-2y+2x-3y},
=x+3y-2y+2x-3y,
=3x-2y.