(12+4)*12+12X=480怎么解
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(12+4)*12+12X=480怎么解
(12+4)*12+12X=480怎么解
(12+4)*12+12X=480怎么解
(12+4)*12+12X=480
12*(12+4+x)=480
16+x=480/12
16+x=40
x=24
X=[480-(12+4)*12]/12
192+12x=480
12x=288
x=24
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