4x-1.2=74

x+1.5x=7500x-0.85x=34x-1.2=74x+1.5x=75002.5x=7500x=3000x-0.85x=30.15x=3x=204x-1.2=744x=74+1.24x=75.2x=9.4x+1.5x=75002.5x

4x-1.2x=7412x+18x-30=692.5+10x=12.55x-7*12=272x-4*2.5=3.6解这些方程1、2.8x=74解得x约等于26.432、30x=96解得x=3.23、10x=10解得x=14、5x=111解得

3X-18=13.21.5X-X=64X+1.2X=263x-18=13.23x=13.2+18x=10.41.5x-x=60.5x=6x=6/0.5=124x+1.2x=265.2x=26x=5

（74+x）／（11+x）=4求x

7x-1.2+0.9=4x7x－1.2+7x一4x=0.33x=0.3x=0.1

6.4x-1.2=4x+2.46.4x-1.2=4x+2.46.4x-4x=2.4+1.22.4x=3.6x=1.52.4x=3.6x=1.5

40\X=16\1.2X=X=30\7=X\5X=X=0.4：1\4=1\9:XX=X=14：0.7=X:0.6X=X=(1)40/x=16/1.2∴x=40×1.2÷16x=3（2）30/7=x/5x=30×5÷7x=150/7（3）0.

3x+0.5x=4.24x-2.16=1.2x-0.2x=162x-4x[这个x是乘】2.5=3.63x+5x=168怎么解3x+0.5x=4.23.5x=4.2x=4.2÷3.5x=1.24x-2.16=1.24x=3.36x=0.84x

解方程：1.2x/2x-1+x/x-2=22.1/2x+3+1/3-2x=4x/4x²-91.方程2x/x+1-1=1/x+1的解是（）A.x=-1B.x=2C.x=1D.x=02.使分式x-1/x²-2x+1的值为0的

0.3x+7x-0.25x=21.15x+7=2x+31.2x+1=0.01x+三分之五4x-26=3x+46x+2=5x+110.3x+7x-0.25x=21.15x+7=2x+31.2x+1=0.01x+三分之五4x-26=3x+46x

1.2x^3-3x^2=27x2.x^3+2x^2-3=03.(2x^2-3x+1)^2+4x^2-1=6x第一题：x=0或4.5或-3第二题：x=1第三题：x=0或1.51：x=0或4.5或-32：x=13：x=0或1.5

2道分式方程1.2X/2X-1+X/X-2=22.9X-7/3X-2-4X-5/2X-3=1”/”代表分号要求：把最简公分母写出来1.2边都乘以(2x-1)(x-2)得2x(x-2)+x(2x-1)=2(2x-1)(x-2)化简得-5x+4

(X-1)(X-2)=X*X-3X+2X*X-3X+2=(X-1)(X-3)X*X+4X+4=X(X-4)+4X*X+Y*Y=(X+Y)(X-Y)哪一个因式分解是正确的第一个正确.其余正确形式是：X*X-4X+3=(X-1)(X-3)X*X

x^2+x^-2=x^4,化简(x+x^-1+x2)(x-x^-1+x²)（-x+x^-1+x²）(x+x^-1-x²)第18题,

4x一5/0.5—5x-0.8/0.2=1.2-x/0.1x=4.7

4x+1.2×5＝24.4x-0.7x=2.18x+5x=2.6（4x+5）÷2=4x+1.2×5＝24.4    x-0.7x=2.18x+5x=2.6   （4x+5

1.2x+3=x-1.2.2x-1=-x+5.3.3分之14x-12X3=14.4.x-9分之4x=4.5÷7分之15要有过程哦2x+3=x-1=>x=-42x-1=-x+5=>3x=6=>x=23分之14x-12X3=14=>14x=15

解方程：7(x+4)=2(2-x)+3(4x-2)1.2x+2=2x-1012-3x=4x+57(x+4)=2(2-x)+3(4x-2)7x+28=4-2x+12x-67x+2x-12x=4-6-28-3x=-30x=-30÷(-3)x=1

4x=100,13+x=18.1,x-1.2=6,5x=1.5,1.6x=4.8,x+2.5=8,X除以3=2.7,X除以0.6=4,这几个方程怎么解,4x=100x=100÷4x=2513+x=18.1x=18.1-13s=5.1x-1.

1.2x+2y=76(x+y)-4x=332.关于x、y的方程组x+y=3,x-y=1x-my=2与nx-y=2有相同的解,试求出m、n的值3.已知关于x、y的二元一次方程组3x+2y=4k+32x+y=2k+1满足的解x+y=6,求k的值