早教吧作业答案频道 -->数学-->
解方程:81x-341=76(x-2),14x-12=7x+23,9(x-4)=45+6x,2(x-2)+3(4x-2)=7(x=4),下面还有6-0.6(x-0.6)=0.6,(3x+2)÷4=2x-7,30÷x+25=85,(200-x)÷5=30急,大家帮帮忙~~~~
题目详情
解方程:81x-341=76(x-2),14x-12=7x+23,9(x-4)=45+6x,2(x-2)+3(4x-2)=7(x=4),下面还有
6-0.6(x-0.6)=0.6,(3x+2)÷4=2x-7,30÷x+25=85,(200-x)÷5=30
急,大家帮帮忙~~~~
6-0.6(x-0.6)=0.6,(3x+2)÷4=2x-7,30÷x+25=85,(200-x)÷5=30
急,大家帮帮忙~~~~
▼优质解答
答案和解析
分别解方程:
81X-341=76(X-2),
81x-76x=341-2*76,
5x=189
x=37.8
14x-12=7x+23,
14x-7x=23+12
7x=35,x=5
9(x-4)=45+6x,
9x-6x=45+4*9
3x=81,x=27
2(x-2)+3(4x-2)=7(x-4),
2x+12x-7x=2*2+3*2-4*7
7x=-18,x=-18/7
6-0.6(x-0.6)=0.6,
0.6x=6-0.6+0.36
0.6x=5.04,x=8.4
(3x+2)/4=2x-7,
3x+2=8x-28,
8x-3x=28+2
5x=30,x=6
30/x+25=85,
30+25x=85x,
85x-25x=30
60x=30,x=1/2
(200-x)/5=30,
200-x=150
x=200-150,x=50
81X-341=76(X-2),
81x-76x=341-2*76,
5x=189
x=37.8
14x-12=7x+23,
14x-7x=23+12
7x=35,x=5
9(x-4)=45+6x,
9x-6x=45+4*9
3x=81,x=27
2(x-2)+3(4x-2)=7(x-4),
2x+12x-7x=2*2+3*2-4*7
7x=-18,x=-18/7
6-0.6(x-0.6)=0.6,
0.6x=6-0.6+0.36
0.6x=5.04,x=8.4
(3x+2)/4=2x-7,
3x+2=8x-28,
8x-3x=28+2
5x=30,x=6
30/x+25=85,
30+25x=85x,
85x-25x=30
60x=30,x=1/2
(200-x)/5=30,
200-x=150
x=200-150,x=50
看了 解方程:81x-341=76...的网友还看了以下:
导数相关的题.1.当K取何值时,分段函数:x不等于0时,f(x)=x的k次方乘以sin(1/x), 2020-06-11 …
设f(x)可导,F(x)=f(x)(1+|x|),要使F(x)在x=0处可导,则必有()设f(x) 2020-06-11 …
①y=x,x=1,y=0②y=根号x,x=4,y=0绕x轴旋转产生的旋转体的体积;③y=x^2,y 2020-06-25 …
解不等式(x-3)(x+4)大于0,根据乘法法则,原不等式可能化成不等式组:x-3大于0,x+4大 2020-06-27 …
设函数f(x)={1,x>0,g(x)=x^2f(x-1),则函数g(x)的递减区间?答案是[0, 2020-07-04 …
求函数的驻点f'x(x,y)=2xy(4-x-y)-x^2y=0.(1)其中f'x(x,y)中左边 2020-07-11 …
关于函数是否连续的问题f(x,y)=(x^4-y^4)/(x^2+y^2)(x,y)不等于(0,0 2020-07-14 …
F(x)=x(e^x-1)-ax^2,若当x≥0时f(x)≥0,求a的取值范围?f(xF(x)=x 2020-07-26 …
f(x)在x=0的邻域有二阶连续导数,f'(0)=f''(0)=0,则在x=0处,f(x)f(x) 2020-07-29 …
[ln(x+e^x)]/x=lim(x->0)(1+e^x)/(x+e^x)怎么得到的?原题limx 2020-11-01 …