把6a+13a 6x-28-2.5x+30.5 8a-(5a+8) (5x+7)-(4x+0.18)这几个算试如何化简?①6a+13a② 6x-28-2.5x+30.5③ 8a-(5a+8) ④ (5x+7)-(4x+0.18)看不清哈

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把6a+13a 6x-28-2.5x+30.5 8a-(5a+8) (5x+7)-(4x+0.18)这几个算试如何化简?①6a+13a② 6x-28-2.5x+30.5③ 8a-(5a+8) ④ (5x+7)-(4x+0.18)看不清哈
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把6a+13a 6x-28-2.5x+30.5 8a-(5a+8) (5x+7)-(4x+0.18)这几个算试如何化简?①6a+13a② 6x-28-2.5x+30.5③ 8a-(5a+8) ④ (5x+7)-(4x+0.18)看不清哈
把6a+13a 6x-28-2.5x+30.5 8a-(5a+8) (5x+7)-(4x+0.18)这几个算试如何化简?
①6a+13a② 6x-28-2.5x+30.5③ 8a-(5a+8) ④ (5x+7)-(4x+0.18)看不清哈

把6a+13a 6x-28-2.5x+30.5 8a-(5a+8) (5x+7)-(4x+0.18)这几个算试如何化简?①6a+13a② 6x-28-2.5x+30.5③ 8a-(5a+8) ④ (5x+7)-(4x+0.18)看不清哈
6a+13a=19a
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