3-1.2x-5分之4x-12等于?

分类: 作业答案 • 2022-02-20 12:42:11

问题描述：

3-1.2x-5分之4x-12等于?

答

3-1.2x-(4x-12)/5=(15-6x)/5-(4x-12)/5=(15-6x-4x+12)/5=24/5-2x

答

3-1.2x-4x/5-12
=3-6x/5-4x/5-12
=3-10x/5-12
=3-2x-12
=-9-2x