x-3/0.5-x+4/0.2=1.6怎么算?急
问题描述:
x-3/0.5-x+4/0.2=1.6怎么算?急
答
x-3/0.5-x+4/0.2=1.6
2x-6-5x-20=1.6
-3x=27.6
x=-9.2