0.5x=0.3(80-x)等于多少,
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0.5x=0.3(80-x)等于多少,0.5x=0.3(80-x)等于多少,0.5x=0.3(80-x)等于多少,0.5x=0.3(80-x)0.5x=24-0.3x0.8x=24x=300.5X=2
0.5x=0.3(80-x)等于多少,
0.5x=0.3(80-x)等于多少,
0.5x=0.3(80-x)等于多少,
0.5x=0.3(80-x)
0.5x=24-0.3x
0.8x=24
x=30
0.5X=24-0.3X
0.5x+0.3x=24
0.8x=24
x=30
0.5x = 0.3(80-x)
0.5x/0.3 = 80-x
0.5x/0.3+x = 80
(0.5/0.3+1)x = 80
x = 80/(0.5/0.3+1)
x = 30
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