8a-(5a+80),(5x+7)-(4x+0.18) 化简这两道算式
问题描述：
8a-(5a+80),(5x+7)-(4x+0.18) 化简这两道算式
答
8a-(5a+80) = 3a+80
(5x+7)-(4x+0.18) = x+6.82
答
8a-(5a+80)=8a-5a-80=3a-80
(5x+7)-(4x+0.18) =5x+7-4x-0.18=x+6.82