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解方程:2x%2=0.5x+2

2x-2=0.5x+2 解:2x=0.5x+2+2 2x=0.5x+4 1.5x=4 5x=

(X+2)÷0.5=5,5*0.5=X+2,5*0.5=2.5,2.5-2=0.5,X=0.5.

解:0.5x+x-4=2 移项: 0.5x+x = 2+4 合并同类项: 1.5x = 6

x1=(-3-√29)/2,x2=(-3+√29)/2。 x^2+3x-5=0的配方法解答过程如下:

2(x+x+0.5)=9.8x=2.2 解题步骤如下:2x+2x+1=9.8;4x+1=9.8;4x

(1)2(10-0.5x)=-(3x+4),去括号得:20-x=-3x-4,-x+3x=-4-20,

(0.5x+2)/0.03-x=[0.3(0.5x+2)]/0.2 0.2(0.5x+2)-0.06

3(x+2)+4y-10=11 0 5(x-2)-6(y+2)=11 解得:x=9.3

(1)2:2.5=x:5 2.5x=2×5 2.5x÷2.5=2×5÷2.

2/5x+0.5x=1.35 2x+2.5x=6.75 4.5x=6.75 x=6.75/4.

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