0.4(x-0.2)+1.5=0.7x-0.38怎样解-搜答案-搜狗做题网

0.4(x-0.2)+1.5=0.7x-0.380.4x-0.08+1.5=0.7x-0.380.3x=1.8x=6（0.6x+420）÷（x+20）=33(x+20)=0.6x+4203x+60=0

X-0.4X=36

X-0.4X=360.6X=36X=60

(1)1+0.4x=0.2(x+10)（2）x÷2=x+2001+0.4x=0.2x+2-200=x/20.2x=1-400=xx=5x=-400

2-x+5/6=x-x-1/3两边乘612-x-5=6x-2x+27-x=4x+25x=5x=10.1-0.2x/0.03-1=0.7-x/0.4两边乘1.240-80x-1.2=5.1-3x77x=

可以先去括号,化简后再“过河”!原方程去括号得：0.4x-0.08+1.5=0.7x-0.380.4x+1.42=0.7x-0.38移项得：0.7x-0.4x=1.42+0.380.3x=1.8解得：

0.2x+0.4x=120.6x=12x=12÷0.6x=2020x+x=42021x=420x=420÷21x=20

首先将所有的都乘开：0.4x-0.08+1.5=0.7x-0.38合并同类项：0.3x=1.8x=6

x+1.5x=12.52.5x=12.5x=50.4x+7.2=100.4x=2.8x=72.1x（x-3）=2.532.1x-6.3=2.532.1x=8.83x≈4.20x-3.7=1.52x=1

X-X×0.2=1.18

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

再答：再答：再问：负数我不明白啊再答：你们没有学吗再问：没啊

2.8x=0.14x=0.24x=0.36x=0.09

x-0.2x=80 求x

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.

5(2-x)=-(2x-7)0.5x-2=0.8(2x-1.5)2(x+0.5)-3(x-0.4)=5.610-5x=-2x+70.5x-2=1.6x-1.22x+1-3x+1.2=5.6-5x+2x

1,3x-4+2x=4x-35x-4x=4-3x=12,2.8x=19.32-6.4x2.8x+6.4x=19.329.2x=19.32x=2.13,0.4(x-0.2)+1.5=0.7x-0.380

0.4X-0.08+1.5=0.7X-0.380.4X+1.42=0.7X-0.381.42+0.38=0.7X-0.4X1.8=0.3XX=6

再问：3(x-1)-2(1.5x-)=4(x-1)再问：1等于负二分之X-1加六分之x-2减三分之x+2

14.5-0.4(x+3)=1.5-0.2(x-7)14.5-0.4x-1.2=1.5-0.2x+1.40.2x=10.4x=52

4x-x=243x=24x=81.5x-x=10.5x=1x=21.9x+0.4x=9.22.3x=9.2x=4

(1)3x(x+0.2)=4x(x-1.1)

(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.