(1) 0.7(3x-3.7)-4=-1.3(3x-3.7) (2) 60%(y-1)=0.1+34%(y+1) (3) (0.2分之0.3+0.2x)+0.5x=0.75

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(1)0.7(3x-3.7)-4=-1.3(3x-3.7)(2)60%(y-1)=0.1+34%(y+1)(3)(0.2分之0.3+0.2x)+0.5x=0.75(1)0.7(3x-3.7)-4=-1

(1) 0.7(3x-3.7)-4=-1.3(3x-3.7) (2) 60%(y-1)=0.1+34%(y+1) (3) (0.2分之0.3+0.2x)+0.5x=0.75
(1) 0.7(3x-3.7)-4=-1.3(3x-3.7) (2) 60%(y-1)=0.1+34%(y+1) (3) (0.2分之0.3+0.2x)+0.5x=0.75

(1) 0.7(3x-3.7)-4=-1.3(3x-3.7) (2) 60%(y-1)=0.1+34%(y+1) (3) (0.2分之0.3+0.2x)+0.5x=0.75
(1) 0.7(3x-3.7)-4=-1.3(3x-3.7)
0.7(3x-3.7)+1.3(3x-3.7)=4
2(3x-3.7)=4
3x-3.7=2
3x=5.7
x=1.9
(2) 60%(y-1)=0.1+34%(y+1)
60(y-1)=10+34(y+1)
60y-60=10+34y+34
26y=104
y=4
(3) (0.2分之0.3+0.2x)+0.5x=0.75
(3+2x)/2+x/2=3/4
2(3+2x)+2x=3
6+4x+2x=3
6x=-3
x=-1/2

3/x-1=4/x 6/x+1=x+5/x(x+1) (X-3分之x-1-x分之x-4)除以x的平方+3x分之(x+3)(x-2),其中(x-1)(x-2)=0 一个“整式的乘法”的问题请先阅读下列解题过程,再仿做下面的问题.已知X*X + X - 1=0,求X*X*X + 2*X*X + 3的值.解X*X*X + 2X*X +3=X*X*X +X*X -X +X*X +X +3=X{X*X +X -1} +X*X +X -1 +4=0+0+4=4+ x + X*X + X*X*X=0.+ X*X + X*X*X (1)(2x/x-1)-(x-1/x)=1 (2)(x^2-4x/x^2-1)+1=2x/x+1 (3)(x+4/x^2+2x)-(1/x+2)=(2/x)+1 (1)(2x/x-1)-(x-1/x)=1 (2)(x^2-4x/x^2-1)+1=2x/x+1 (3)(x+4/x^2+2x)-(1/x+2)=(2/x)+1 解下列方程!就三道!解下列方程.1、x/x-2 - 1-x²/x²-5x = 2x/x-3(x/x-2 - 1-x²不是一起的!)2、5x/x²+x-6 - 5-2x/x²-x-12=7x-10/x²-6x+8(5x/x²+x-6 - 5-2x不是一起的!)3、x-4/x-5 + x-8/x-9=x-7/x- x+5/x+1-3x-3/x+5=8x+28/x^2+4X-5-2(x+5)/(x+1)-(3x-3)/(x+5)=(8x+28)/(x^2+4X-5)-2 2x-6/4-4x+x^2/(x+2)*x^2-4/3-x,其中x=-1 (x+2分之3x-x+2分之x)/x平方-4分之x(x-1)=4 1/(x+1)(x+2) + 1/(x+2)(x+3) + 1/(x+3)(x+4) + ...+ 1/(x+2005)(x+2006) = 1/2x+4012 (x-3/x-2)-(x-2/x-1)=(x-5/x4) -(x-4/x-3) 解九宫格题目(X为未知数)9 X 2 X 7 X 8 X XX X 4 X X 9 X 6 X1 3 X 5 X X X X 24 X X 8 5 X X 1 XX 8 9 4 X 1 6 7 XX 1 X X 3 6 X X 88 X X X X 2 X 3 6X 5 X 6 X X 9 X XX X 7 X 4 X 2 X 1 x(x+1)+(x+2)+(x+3)+(x+4)+(x+5) = 27求x x-1/x+2-(x-1)/(x平方-4)=1-3/2-x 请问这道题咋做 :(x)X (x+1) X (x+2) X (x+3) =360 1、x*(x+3)*(x+6)*(x+9)=68040 2、x*(x+1)*(x+2)*(x+3)*(x+4)=55440 x(x^2-1)+2x^2 *(x+1)-3x*(2x-5)=x(3x^2-4x)-28 3X+(X+2)+(X+1)*(X-1)=4*(X²+8)