简化 6a+13a 6x-28-2·5x+30·5 8a-(5a+8) (5x+7)-(4x+0·18)

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简化 6a+13a 6x-28-2·5x+30·5 8a-(5a+8) (5x+7)-(4x+0·18)

简化 6a+13a 6x-28-2·5x+30·5 8a-(5a+8) (5x+7)-(4x+0·18)
简化 6a+13a 6x-28-2·5x+30·5 8a-(5a+8) (5x+7)-(4x+0·18)

简化 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+1·5
8a-(5a+8)
=8a-5a-8
=3a-8
(5x+7)-(4x+0·18)
= 5x+7-4x-0·18
= 5x-4x+7-0·18
= x +6.82