化解这些题6a+13a 6x-28-2.5x+30.5 8a-(5a+8) (5x+7)-(4x+0.18)

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化解这些题6a+13a 6x-28-2.5x+30.5 8a-(5a+8) (5x+7)-(4x+0.18)
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化解这些题6a+13a 6x-28-2.5x+30.5 8a-(5a+8) (5x+7)-(4x+0.18)
化解这些题
6a+13a 6x-28-2.5x+30.5 8a-(5a+8) (5x+7)-(4x+0.18)

化解这些题6a+13a 6x-28-2.5x+30.5 8a-(5a+8) (5x+7)-(4x+0.18)
6a+13a= 19a
6x-28-2.5x+30.5=(6x-2.5x)+(30.5-28)= 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