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数学
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16(2x-30)-9(x-10)=1
人气:478 ℃ 时间:2020-02-06 00:01:49
解答
16(2x-30)-9(x-10)=1
32x-480-9x+90=1
23x-390=1
23x=391
x=17
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60%x+25=40 x+30%x=52 19-120%x=7 4分之3x-5%x=17.5 x-10%x=18 (1-25%)x=36 2x+30%x=9.2
1/20*(16-x)+7/100*x=1 和(1/20*4/5+1/30*9/10)x+(16-x)*1/20=1怎么解?
(2x-10)x(1+50%)=30
(10-2x)(8-x)=10×8×(1-30%),
2X+(10-x)=16
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