作业帮(x-40)-[1/4(x-40)+1/3(x-40)]+40=(1/2)x怎么解
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(x-40)-[1/4(x-40)+1/3(x-40)]+40=(1/2)x怎么解
(x-40)-[1/4(x-40)+1/3(x-40)]+40=(1/2)x怎么解
(x-40)-[1/4(x-40)+1/3(x-40)]+40=(1/2)x怎么解
(x-40)-[1/4(x-40)+1/3(x-40)]+40=(1/2)x
{(x-40)-[1/4(x-40)+1/3(x-40)]+40}*2=x
2x-80-(1/2)(x-40)-(1/3)(2x-80)+80=x
x-(1/2)(x-40)-(1/3)(2x-80)=0
(1/6)(6x-3x+120-4x+160)=0
(1/6)(280-x)=0
280-x=0
x=280
x=280