28加百分之30x等于58
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25%x=20x=20×100/25=80x+35%x=540135%x=540x=540×100/135=400x-78%x=8822%x=88x=88×100/22=400
90+60%x=10260%x=102-900.6x=12x=20
60%X+15=4060%X=25X=25/60%=125/3
X+15%=6.9X=6.9-0.15X=6.75
70/100x+(30-x)*50/100=30*65/1007x/10+15-0.5x=19.50.2x=4.52x=45x=45/2x=22.5
35x%+25x%=12.4860x%=12.4860x=1248x=20.8
(x+1)34%+0.1x=(x-1)60%0.34(x+1)+0.1x=0.6(x-1)0.34x+0.34+0.1x=0.6x-0.60.34x+0.1x-0.6x=-0.6-0.34-0.16x
85+30%x-40%x=8085+0.3x-0.4x=800.4x-0.3x=85-800.1x=5x=5÷0.1x=50
1.20/50=40%2.2x+40%x=7.2(2+0.4)x=7.2x=33.30*2/3+80%x=6020+0.8x=600.8x=40x=504.错
百分之70x加百分之40x减x等于1.80.7x+0.4x-x=1.80.1x=1.8x=1.8÷0.1=18再问:再问下百分之160x减x等于9再答:百分之160x减x等于91.6x-x=90.6x
35+35%x=700.35x=70-350.35x=35x=35÷0.35x=100
X=100
这么简单还问,
18+120%x=24120%x=6x=6/120%x=5
32+0.75x=560.75x=24x=32再问:32减百分之75X等于8再答:32-0.75x=80.75x=24x=32
百分之21乘x加百分之42等于百分之18乘x减3两边同乘以100得:21x+42=18(x-3)3x=-96x=-32再问:为什么(x-3)有括号?再答:百分之21乘x加百分之42等于百分之18乘x减