x-70=2 3*(80% 70)
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方程两边同时乘以(x+3)(x+2)(x+4),则方程变成5x(x+4)+(2x-5)(x+2)=(7x-70)(x+3)3x^2+19x-10=7x^2+49x-2102x^2+15x-100=0(
90%x-80=70%x+700.9x-80=0.7x+700.9x-0.7x=80+700.2x=150x=150÷0.2x=750
300+x=3X(70+x)300+x=210+3x3x-x=300-2102x=90x=45在右上角点击【评价】,然后就可以选择【满意,问题已经完美解决】了.
70%x-45%x=360.7x-0.45x=360.25x=36x=144x+25%x=80x+0.25x=801.25x=80x=64如果您感到满意的话,请您适当加分!
X-(0.2X+0.2X+50)=70X-0.4X-50=700.6X=120X=200
5x+35=140-2x5x+2x=140-357x=105x=159x-27=70+4x9x-4x=70+275x=97x=97/512+7x=2x+327x-2x=32-125x=20x=4250
(X-5)÷80%=X+70X-5=80%(X+70)X-5=0.8(X+70)X-5=0.8X+56X-0.8X=56+50.2X=61X=305
解70-2x=6(x+5)70-2x=6x+30-8x=-40x=5
25%x=80x=320再答:170%x=68x=40再答:15%x+20=8015%x=80-2015%x=60x=300再答:30%x=62+2830%x=90x=300再答:45-20%x=25
133.6X=84X=2.5左边=24*2.5+9.6*2.5=84=可边26.7X=33.5X=5左边=14.3*5-7.6*5=33.5=右边35X=70X=14左边=7*14+8*14-10*1
1.6x=70再答:x=再问:x=什么再答:43.75再答:请采纳吧
你题目校对一下!如果是5x/(x+3)(x+2)+(2x-5)/(x-4)(x+3)=(7x-70)/(x+2)(x-4)那么1/[X+3]*5X/[X+2]+1/[X+3]*[2X-5]/[X-4]
x-30%x=4分之370%x=3/47/10x=3/4x=3/4÷7/10x=3/4×10/7x=15/143-70%x=0.270%x=3-0.20.7x=2.8x=2.8÷0.7x=450%x+
(X+30%X)70%=X-181.3x×0.7=x-180.91x=x-18(1-0.91)x=180.09x=18x=18÷0.09x=200
120℅x-17=7120℅x=7+17120℅x=24x=24÷120℅x=2070℅x-25℅x=2.745℅x=2.7x=2.7÷45℅x=6x+115℅x=2.58215℅x=2.58x=2.
0.2x=20x=20÷0.2x=100请点击下面的“选为满意答案”按钮,
2x+160=3x-210x=370
60x+70(100-x)=630060x+7000-70x=630070x-60x=7000-630010x=700x=700÷10x=70
(70-X)x20=40070-X=20X=50
5x+6x+60+10x+300+6x+420+3x+450=273030x+1230=2730(2730-1230)/30=50所以X=50