[ 6x-28-2.5x+30.5 ]简化[ (5x+7)-(4x+0.18)

分类: 作业答案 • 2023-01-19 22:54:01

问题描述：

答

1.6x-28-2.5x+30.5
=（6-2.5）x+(30.5-28)
=3.5x+2.5----------------------------------------------------------2.(5x+7)-(4x+0.18)
=5x+7-4x-0.18
=x+6.82