4.2x-2.7x=0.6
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4.2x-2.7x=0.64.2x-2.7x=0.64.2x-2.7x=0.64.2x-2.7x=0.61.5x=0.6x=0.44.2x-2.7x=0.61.5x=0.6x=0.42/5x^4+x^
4.2x-2.7x=0.6
4.2x-2.7x=0.6
4.2x-2.7x=0.6
4.2x-2.7x=0.6
1.5x=0.6
x=0.4
4.2x-2.7x=0.6
1.5x=0.6
x=0.4
2/5
x^4+x^3-3x^2+7x-6=0 x^4+x^3-2x^2-x^2+7x-6=0 x (x+2...由于x -x+2=0无解。所以，原方程的解是： x1=1；x2=-3 x^4...
4.2x-2.7x=0.6
4.2-0.6X=3.6X
x+6x=8.4 2.4x+x=27.2 9x-4.2x=24 x-0.6x=4.8 8.6x-4.6x=10.4 7x+0.3x=3.65解方程要过程详细.
4.2-0.6x=3.6x 5x+2x=33.6 7x-4x=0.75 2x+7x+2.1=12 56x-32x-119=361 x+5=2x 3x+9=6x 4x-28=2x 2x+18=7x 5x=25*4-15x 7x-x+2*3=29.4 (28.8+5.5x+3.2）除2=71
（X+X)+(X-X)+(X*X)+(X/X)=100
X+0.8X=2.7
x-0.8x=4.2
0.6x(200-X)-4X=106.2 X=?
(8.9-x)/x=0.6
x--0.6x=4.8
x-0.6x=14
0.6x+140 =X
(10000-x)/x=0.6
0.6X+140 =X
x-0.6x=5.6
x-0.6x=2.4
x-0.9=x+0.6
x-0.6x=0.7