作业帮0.5(x-0.2)=0.9x-1.78
来源：学生作业帮助网 编辑：作业帮 时间：2024/07/14 01:57:44
0.13x-0.13=0.07x+0.070.13x-0.07x=0.13+0.070.06x=0.2x=20/6(二十分之六）都乘以6030x-10x+7.5x-6x=43/6021.5x=43/6
[x-x/(x+1)][(x+1)/(x^2+4x+4)][(x^2-4)/(x^2-2x)]=[x^2/(x+1)][(x+1)/(x+2)^2][(x+2)(x-2)/x(x-2)]=x/(x+2
1-0.5x/0.3-2/3x=0.3x/0.2x+1原方程为：1-5/3x-2/3x=3/2+1解之：1-7/3x=5/27/3x=1-5/2x=-3/2x3/7x=-9/14
（X+X)+(X-X)+(X*X)+(X/X)=1002X+0+X*X+1=1002X+X*X=99X(X+2)=99X=9再问：请问X(X+2)=99解为什么就等于9了呢没看懂再答：换成算术法你就明
1.两边同乘以10：即得2(x-1)-5(2x+5)=108x=-37得x=-37/8（-8分之37）2.x=-43.左边分子分母乘以100再算,右边0.3的分子分母乘以10,左右同乘以150240x
0.2x+0.4x=120.6x=12x=12÷0.6x=2020x+x=42021x=420x=420÷21x=20
当然能算出来X-X×0.2=1.18（1-0.2）X=1.180.8X=1.18解得X=1.475
1.5x=30x=20再问：过程再答：x+0.5x=301.5x=30x=20
9x=0x=0
再答：采纳啊。再答：谢谢。
x-0.2x=800.8X=80X=100在右上角点击【评价】,然后就可以选择【满意,问题已经完美解决】了.
0.9(17-3X)+1.4X+0.5X=12.90.9(17-3X)+1.9X=12.915.3-2.7X+1.9X=12.92.4=0.8XX=3
3x+0.5x=4.23.5x=4.2x=4.2÷3.5x=1.24x-2.16=1.24x=3.36x=0.84x-0.2x=160.8x=16x=202x-4x乘以2.5=3.62x-10=3.6
先把2边都乘上10然后都是整数了,好算由于你题目有点奇怪,就不帮你继续化简了
（3.6-1）x=3.252.5x=3.25x=1.312.5x-0.9x=52.211.6x=52.2x=4.5x-0.72x=0.3360.28x=0.336x=1.28x-0.5x=37.57.
1/2x^2-1/4x+0.2x^3+0.25x-0.5x^2-1/5x^3+0.5x-1=(1/2x^2-0.5x^2)+(0.25x-1/4x)+(0.2x^3-1/5x^3)+0.5x-1=0.
(0.8x+0.9)÷0.5=(x+5)÷2+(0.3x-0.2)÷0.31.6X+1.8=0.5X+2.5+X-2/34.8X+5.4=1.5X+7.5+3X-20.3X=0.1X=1/3
2(0.9-x)+4=4.31.8-2x+4=4.35.8-2x=4.32x=5.8-4.32x=1.5x=0.75(x+1.8)/8=6.6.x+1.8=52.8x=52.8-1.8x=5112x+
(1)3x(x+0.2)=4x(x-1.1)3x+0.6=4x-4.44x-3x=0.6+4.4x=5(2)乘以0.8得4(1-x)=3x4-4x=3x4=7xx=4/7（7分之4）（3）1.1x1.