-0.4x+0.9/0.5=0.2x+0.3/0.3+1d等于几

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-0.4x+0.9/0.5=0.2x+0.3/0.3+1d等于几
d是打错的(-0.4x+0.9)/0.5=(0.2x+0.3)/0.3+1

-0.4x+0.9/0.5=0.2x+0.3/0.3+1 即
-0.4x+1.8=0.2x+1+1
1.8-1-1=0.2x+0.4x
-0.2=0.6x
x=-0.2/0.6=-1/3
再问：我把题目弄错了，请大虾再帮我解一下，我会给你设为满意回答
再答： (-0.4x+0.9)/0.5=(0.2x+0.3)/0.3+1 两边同乘以0.15去分母得 0.3*(-0.4x+0.9)=0.5*(0.2x+0.3)+0.15 -0.12x+0.27=0.1x +0.15+0.15 移项得 0.27-0.15-0.15=0.1x+0.12x 合并同类项得 -0.03=0.22x x=-0.03/0.22=-3/22

-0.4x+0.9/0.5=0.2x+0.3/0.3+1d等于几 X-1/0.3-0.5-0.1x/0.2=2怎么解就是0.3分之X-1减去0.2分之0.5-0.1X＝2,求X等于几 X/6-1=X/10+I,X等于几 x+1=x+2 x等于几? int x=2; x*7.2/x+1 等于几 5x-3x=1 求x等于几? 0.3x-xx0.25=21.15-7x x等于几设随机变量X的方差D(X)=1,则E(D(X))等于多少,D(E(X))等于多少, (x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几? 1乘x等于几 x+1等于二分之一x-1 X等于几 4-3x等于x+1 x等于几