(x-5)尀0.5-(x+4)尀0.2=-2.4 怎么解。要过程、。

2024-12-16 14:08:51
推荐回答(3个)
回答1:

(x-5)/0.5-(x+4)/0.2=-2.4
左右两边同时乘以1
2(x-5)-5(x+4)=-2.4
2x-10-(5x+20)=-2.4
2x-10-5x-20=-2.4
移项:5x-2x=-10-20+2.4
3x=-27.6
x=-27.6÷3
x=-9.2

回答2:

(x-5)\0.5-(x+4)\0.2=-2.4
两边乘于1 2(x-5)-5(x+4)=-2.4
2x-10-5x-20=-2.4
2x-5x=-2.4+10+20
3x=-27.6
x=-27.6\3
x=-9.2

回答3:

(x-5)*2-(x+4)*5=-2.4
2x-10-(5x+20)=-2.4
2x-10-5x-20=-2.4
-3x-30=-2.4
-3x=27.6
x=-9.2