0.3x+(1000-x)(-0.5)=260这个方程怎么解?

2025-12-14 17:47:52
推荐回答(1个)
回答1:

0.3x+(1000-x)(-0.5)=260
0.3x+(-200)+0.5x=260
0.3x+0.5x=460
0.8x=460
x=575