22.5-0.4x=12.5

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22.5-0.4x=12.5
3X+2.5=5X-12.5

3x=5x-152x=15x=7.5

x加12.5x=7.2

x加12.5x=7.213.5X=7.2X=7.2/13.5X=5.33再问:不是循环小数么再答:是啊后面是3循环

方程x-0.4x+360:x=3:

(0.6x+360):x=3:40.2x+120=1/4x0.8x+480=xx=2400再答:x:60%x+360=4:31/4x=20%x+120x=0.8x+480x=2400再答:小意思再问:

求未知数X.(6分) 22.5-0.4x=12.5

22.5-0.4x=12.522.5-12.5=0.4x10=0.4xx=25

X-0.4X=36

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

(X+X)+(X-X)+(X*X)+(X/X)=100

(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

0.2x+0.4x=12 x=?20x+x=420 x=?

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

小学数学 解复杂方程x+1.5x=12.5 0.4x+7.2=10 2.1x(x-3)=2.53 x-3.7=1.52

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

解方程22.5-0.4x=125

22.5-0.4x=1250.4x=22.5-1250.4x=-102.5x=-256.25如果不懂,祝学习愉快!再问:修一条水渠,甲队单独修要18天,乙队单独修要12天,甲队先修3天,剩下的两队合修

12.5-2x=4x+7.1

12.5-2x=4x+7.14x+2x=12.5-7.16x=5.4x=0.9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.再问:谢了

解方程:3.2x=170%x+22.5 x=( )

3.2x=170%x+22.53.2x=1.7x+22.53.2x-1.7x=22.51.5x=22.5∴x=15

(x+3)(x-4)-x(x-2),化简求值,其中x=12.5

(x+3)(x-4)-x(x-2)=x²-x-12-x²+2x=x-12=12.5-12=0.5

(108-x)/x=12.5% 怎么解

(108-x)/x=12.5%108-x=0.125x1.125x=108x=96

0.4x+3.2=2.5x+0.05 X是多少

0.4x-2.5x=0.05-3.22.1x=3.15x=1.5

12.5x+x=10.8怎么解

12.5x+x=13.5x=10.8x=10.8/13.5所以x=0.8

20%x=(520-x)*12.5%,

20%x=(520-x)*12.5%0.2x=520*0.125-0.125x0.325x=0.125*520x=200

2x+{3X(12.5-x)}=30

原式化简得2x+3*12.5-3x=30-x=30-37.5x=7.5

求未知数X. 22.5-0.4X=12.5 X:3.5=4:213

(1)22.5-0.4x=12.5,   22.5-0.4x+0.4x=12.5+0.4x,      &nb

x+12.5=3.5x

x+12.5=3.5x移项3.5x-x=12.5合并同类项2.5x=12.5等式两边同除以2.5x=5