X(X+60)=3400
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0.58X+0.52X=3400+X0.58X+0.52X=3400+X0.58X+0.52X=3400+X0.58X+0.52X=3400+X1.1x=3400+x0.1x=3400x=34000
(X+X)+(X-X)+(X*X)+(X/X)=100(X+X)+(X-X)+(X*X)+(X/X)=100(X+X)+(X-X)+(X*X)+(X/X)=100(X+X)+(X-X)+(X*X)+(X/X)=1002X+0+X*X+1=1
x/(120-x)=(60-x)/60x/(120-x)=(60-x)/60x/(120-x)=(60-x)/60两边都乘以60(120-x)(x≠120)60x=(60-x)(120-x)60x=7200-180x+x²x
x(x-1)(x+1)=60x(x-1)(x+1)=60x(x-1)(x+1)=60x^3-x-60=0一元三次方程代入公式求根!方程x^3+px+q=0的三个根为:x1=[-q/2+((q/2)^2+(p/3)^3)^(1/2)]^(1/
x/(120-x)=x/60x/(120-x)=x/60x/(120-x)=x/60交叉相乘∴60x=-x²+120x∴x²-60x=0∴x(X-60)=0∴x=0或60x/(120-x)=x/60(120-x)x=60
60%X+80%X-12=X60%X+80%X-12=X60%X+80%X-12=X60%X+80%X-12=X1.4x-x=12x=301.4X-X=12X=30
60x(x-4)=30x60x(x-4)=30x60x(x-4)=30x60x(x-4)=30x60x-240=30x30x=240x=860x(x-4)=30x2x(x-4)=x2x²-8x=x2x²-9x=0x(2x
7x-3x+x=607x-3x+x=607x-3x+x=607x-3x+x=605x=60x=127x-3x+x=60化简:5x=60x=12
x-(25%x+6)=60%xx-(25%x+6)=60%xx-(25%x+6)=60%xx-(25%x+6)=60%x化为x-(0.25x+6)=0.6xx-0.25x-6=0.6x0.75x-6=0.6x0.75x-0.6x=60.15
12x(x+x)=60X=?12x(x+x)=60X=?12x(x+x)=60X=?2x=60÷12
x+x+x+y=60.x-y=4x+x+x+y=60.x-y=4x+x+x+y=60.x-y=43x+y=60①x-y=4②①+②得4x=64x=16y=12两个等式(方程)相加得4x=64,x=16;进一步可求得y=12X-Y=4X=4+
(x+20)+x=60+x-(x+20)(x+20)+x=60+x-(x+20)(x+20)+x=60+x-(x+20)(x+20)+x=60+x-(x+20)2x+20=60-202x=20x=10(x+20)+x=60+x-(x+20)
X+X-6+X-4+X/2=60X+X-6+X-4+X/2=60X+X-6+X-4+X/2=60X+X-6+X-4+X/2=607x/2=70x/2=10x=20X+X-6+X-4+X/2=603x+x/2=60+107x/2=70x/2=
x-60%x-25%x=25%x-30x-60%x-25%x=25%x-30x-60%x-25%x=25%x-30移项0.25x+0.25x+0.6x-x=300.1x=30x=30÷0.1x=300x=-2和4,函数值相等所以对称轴x=(
x*x-(x-2)*(x-5)=60x*x-(x-2)*(x-5)=60x*x-(x-2)*(x-5)=60x^2-x^2+7x-10=607x-10=60x=1010,括号打开,x*x消去,7x-10=60
50x(x-1)+60x(x-4)=510050x(x-1)+60x(x-4)=510050x(x-1)+60x(x-4)=510050x(x-1)+60x(x-4)=510050x-50+60x-240=5100110x-290=5100
x*x*x*x*x=80000?x*x*x*x*x=80000?x*x*x*x*x=80000?计算器.真是太笨了!≈9.564如果在上课,教你个方法:带个智能手表,去TM老师管不着!我说,你怎么会考到这样的题呀……≈9.563524998
12-x=60%x12-x=60%x12-x=60%x12-x=60%xx+0.6x=121.6x=12x=12÷1.6x=7.512-x=60%x12=1.6xx=7.5移向得1.6x=12解得x=7.512-x=0.6x12=0.6x+
3x-60=x3x-60=x3x-60=x3x-60=x3x-x=602x=60x=303x-60=x3x-x=602x=60x=30是要解方程吗?3x-x=-602x=-60x=-303x-60=x3x-x=602x=60x=60÷2x=
x+20%x=60x+20%x=60x+20%x=6050