作业帮60:0.25x=0.25:0.75
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0.35x+0.25×(32-X)=10.40.35x+8-0.25x=10.40.35x-0.25x=10.4-80.1x=2.4x=2.4÷0.1x=24
0.3x-x×0.25=21.15-7x0.3x-0.25x=21.15-7x0.5x=21.15-7x0.5x+7x=21.157.5x=21.15x=21.15÷7.5x=2.82这里涉及到“两边
2x^2=3x+22x^2-3x-2=0(2x+1)(x-2)=0x=-1/2或x=22x^2=3x+2x^2-3/2x-1=0x^2-3/2x+(3/4)^2-(3/4)^2-1=0(x-3/4)^
(0.3+7-0.25)x=21.157.05x=21.15x=21.15/7.05=3
0.3x-x乘以0.25=21.15-7x0.05x+7x=21.157.05x=21.15x=3
X-[(X-3500)*0.25-1005]=10000x-(x-3500)*0.25+1005=10000x-0.25x+875+1005=100000.75x=10000-18800.75x=81
X-0.25X=30.75X=3X=4
y'=1/(1+x)-0.5x=-[(x+2)(x-1)]/[2(1+x)]当x=1时,y'=0当x属于[0,1)时,y'>0当x属于(1,2]时,y'0所以y属于[0,(ln2)-0.25]
x-0.25=0.25x化为x-0.25x=0.25即0.75x.=0.25所以x=0.25/0.75=1/3=0.333333
1.5x=1.25（x+10)1.5x=1.25x+12.50.25x=12.5x=50
方程是啥?如果为：x^0.75-x^0.25=0.75令t=x^0.25,则x^0.75=t^3方程化为:t^3-t=0.75,解得：t=1.26255112740716x=t^4=2.5409486
0.3x+7x-0.25x=21.257.05x=21.25705x=2125x=425/141
将0.25-x和0.25都乘以2,所以等式两边大小不变得(2.25+3x)³/[(0.5-2x)²(0.5-2x)]=(0.75)³/[(0.5)²(0.5)]
x+0.25x=7分之81.25x=7分之8x=35分之32再问：����1.25x=7��֮8������ϸ����лл再答：1.25x=7��֮84��֮5x=7��֮8x=7��֮8��4��֮
0.3x+7x-0.25x=7.05x7.05x=21.15x=3
10x-3.14*x*x*0.25=3.14*x*x*0.7510x=3.14*x*x*0.75+3.14*x*x*0.253.14*x*x*(0.75+0.25)-10x=03.14*x*x-10x
(1)0.3x+7x-0.25x=21.5(0.3+7-0.25)x=21.57.05x=21.5x=141/430(2)8.7*(36-x)=031.2-8.7x=031.2=8.7xx=312/8
1.cos(x+60)=cos60cosx-sin60sinx=0.5cosx-(√3/2)sinxcos(60-x)=cos60cosx+sin60sinx=0.5cosx+(√3/2)sinx∴f