4(2x-1)-2(10x+1)=3(2x+1)-12
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4(2x-1)-2(10x+1)=3(2x+1)-12
4(2x-1)-2(10x+1)=3(2x+1)-12
8x-4-20x-2=6x+3-12
-12x-6=6x-9
-12x-6x=-9+6
-18x=-3
x=1/6
再问: 2(x-2)-6(x-1)=3(1-x) 3(y-7)-2[9-4(2-y)]=22 2(x-2)-6(x-1)=3(1-x)
再答: 2(x-2)-6(x-1)=3(1-x) 2x-4-6x+6=3-3x 8x+2=3-3x 8x+3x=3-2 11x=1 x=1/11
再问: 3(y-7)-2[9-4(2-y)]=22
再答: 3(y-7)-2[9-4(2-y)]=22 3y-21-2(9-8+4y)=22 3y-21-2-8y=22 -5y=22+21+2 -5y=45 y=-9
8x-4-20x-2=6x+3-12
-12x-6=6x-9
-12x-6x=-9+6
-18x=-3
x=1/6
再问: 2(x-2)-6(x-1)=3(1-x) 3(y-7)-2[9-4(2-y)]=22 2(x-2)-6(x-1)=3(1-x)
再答: 2(x-2)-6(x-1)=3(1-x) 2x-4-6x+6=3-3x 8x+2=3-3x 8x+3x=3-2 11x=1 x=1/11
再问: 3(y-7)-2[9-4(2-y)]=22
再答: 3(y-7)-2[9-4(2-y)]=22 3y-21-2(9-8+4y)=22 3y-21-2-8y=22 -5y=22+21+2 -5y=45 y=-9
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
4x-2=3x+1 -x+3=10 x-7=11-x x=四分之一x+6
(x-1)^3(x+1)(x-2)/(x+4)
(x+1)(x+2)(x+3)(x+4)+1
化简求值 :2x(x²-x+1)-x(2x²+2x-3) x=﹣二分之一
(x+2/x+1)-(x+4/x+3)-(x+3/x+2)+(x+5/x+4)
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
.2x(3x+1)=9x+3(x+8)(x+1)=12
解方程6^x+4^x=9^x,9^(-x)-2*3^(1-x)=27
先化简,再求值:[(x-2/x²+2x)-(x-1/x²+4x+4)]÷﹙x-4/x+2﹚,其中x&
x*x+2x+x*x+10x+x*x+25+2x+x*x+1+1+16+x*x+4x*x+9-12x+16x*x+4-1