化简 6x-28-2.5x+30.5 还有也是化简 8a-(5a+8)还有啊 (5x+7)-(4x+0.18) 这些都是化简.

问题描述:

化简 6x-28-2.5x+30.5 还有也是化简 8a-(5a+8)还有啊 (5x+7)-(4x+0.18) 这些都是化简.

6x-28-2.5x+30.5
=3.5x+2.5
8a-(5a+8)
=8a-5a-8
=3a-8
(5x+7)-(4x+0.18)
=5x+7-4x-0.18
=x+6.82