大师作文网75 x=34.5解方程
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/12 15:24:40
2x/3+3x/4=1/6;17x/12=1/6;x=2/17;
x/4+0.25=75%x/4=0.75-0.25x/4=0.5x=4*0.5x=2
75%x＋5x=17.60.75x+5x=17.65.75x=17.6x=1760/575x=352/115
75%x-60%x=4.515%x=4.5x=30
75%x-25%x=550%x=5x=10
75x=60(x+3.2)75x=60x+19275x-60x=19215x=192x=192/15x=12.8
0.25+240-x=0.75x0.25+240=1.75x240.25=1.75xx=961/7
25%=1/4所以x/4=75所以x=75×4=300
X/5=2+(75-25)-X/15X/5=2+50-X/15X/5=52-X/15X/5+X/15=523X/15+X/15=524X/15=52X/15=13X=195
4x=7(75-x)4x=525-7x4x+7x=52511x=525x=525/11
75%=0.75,20%=0.2所以0.75X+18=（1.55+0.2*0.5）X1.65X-0.75X=18X=20
X=70/(1+150/%)=28X=15/30%=45X=55/(1+25%)X=44X=(50-20)/40%=75X=40/(1-80%)=200X=25.2/63%=40.6X=140/(55
5/8x(x-0.3)=75%两边乘8/5x²-0.3x=6/5x²-3x/10+9/400=6/5+9/400(x-3/20)²=489/400x-3/20=±√489
40%x+（14-x）×75%=70.4+10.5-0.75x=70.75x-0.4x=10.5-70.35x=3.5x=10
80%x—75%x=1500.05x=150x=3000
27/5x=75x=375/27
0.75x=25-100.75x=15 x=15÷0.75 x=20再问：75%X��50=100��ô��
x*5=100*75%5x=75x=75/5x=15
75%X=60x=60÷¾x=80
120%x-x=751.2x-x=750.2x=75x=375