搜狗做题网50-x=38
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再答：
x加30%x=521.3x=52x=52×1.3x=40x减40%x=150.6x=15x=15÷0.6x=2550%x加x=31.51.5x=31.5x=31.5÷1.5x=21x减1%x=19.8
6000/(x+50)+3000/x=9000/(x+30)化简：2/(x+50)+1/x=3/(x+30)等式两边同乘x(X+50)(X+30)2X(X+30)+(X+50)(X+30)=3x(X+
3x=x+1003x-x=1002x=100x=100/2x=50
38x+15.6=x解38x-x=-15.637x=-15.6x≈0.42
90/(x-90)=(2x-50)/(x+50)(2x-50)(x-90)=90(x+50)2x^2-230x+4500=90x+45002x^2-230x-90x+4500-4500=02x^2-3
x-60%x+28=50%x-9x-0.6x+28=0.5x-90.4x+28=0.5x-90.5x-0.4x=28+90.1x=37x=370
X-(0.2X+0.2X+50)=70X-0.4X-50=700.6X=120X=200
（X+X)+(X-X)+(X*X)+(X/X)=1002X+0+X*X+1=1002X+X*X=99X(X+2)=99X=9再问：请问X(X+2)=99解为什么就等于9了呢没看懂再答：换成算术法你就明
解方程x-5%x=38x(1-5%)=38xX0.95=38x=4032%X+40X=21.6x(32%+40)=21.6xX40.32=21.6x=21.6/40.32x=15/2850-125%X
x-25%X-(25%x-25)=50x-0.25X-0.25X+25=500.5X=25X=50再问：很快，谢谢你
50X+40X×(2.5X)=12050X+100X=120150X=120X=120/150X=0.8
1.5X+20=1X（50-X)1,5x+20=50-x1.5x+2=50-202.5x=30x=12
20%x+[25*20%x]+12=50%x+20.2x+5x+12=0.5x+24,7x=-10x=-100/47
(60%x-28)+(50%x+9)=X60%x-28+50%x+9=X(60%+50%)x-19=x1.1x-x=19(1.1-1)x=19x=190
(50+2x)(50-x)=21002500+50x-2x²=2100x²-25x-200=0x=(25±5√57)/2
x+38/9=5/6-x2x=5/6-38/9x=-(61/36)
3.14*0.5x³=50x³=100/3.14x约等于3.170
5（x+x+27）-38=1475（2x+27）=1852x+27=372x=10x=5
130%x+x=4.61.3x+x=4.62.3x=4.6x=2x÷50%=10x=10乘2x=20x/9-x/15=16%x（1/9-1/15）=16/100x（5/45-3/45）=4/25x=4