(0.4x+0.9)/0.5+(x-5)/2=(0.02x+0.03)/0.03快意点
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(0.4x+0.9)/0.5+(x-5)/2=(0.02x+0.03)/0.03快意点
(0.4x+0.9)/0.5+(x-5)/2=(0.02x+0.03)/0.03
快意点
(0.4x+0.9)/0.5+(x-5)/2=(0.02x+0.03)/0.03快意点
(0.4x+0.9)/0.5+(x-5)/2=(0.02x+0.03)/0.03
推导出(4x+9)/5+(x-5)/2=(2x+3)/3
继续 24x+54+15x-75=20x+30
所以 19x=51
x=51/19
0.4x/0.5+0.9/0.5+x/2-5/2=0.02x/0.03+0.03/0.03
4x/5+9/5+x/2-5/2=2x/3+1
19x/30=17/10
x=51/19