0.4x+0.9/0.5-0.3x+0.1/.2-0.75-0.5x/0.75=0怎么解,求你了
问题描述:
0.4x+0.9/0.5-0.3x+0.1/.2-0.75-0.5x/0.75=0怎么解,求你了
答
2x/5+9/5-3x/10+1/2-3/4-2x/3=0
17x/30-31/20=0
x=93/54