2分之3X+5等于3分之2x减1这道方程怎么解

2024-11-23 23:33:38
推荐回答(5个)
回答1:

解:原方程即:
3/2*x+5=2/3*x-1
3/2*x-2/3*x=-5-1
9/6*x-4/6*x=-6
5/6*x=-6
x=-36/5
x=-7又1/5
分析:根据等式的性质解一元一次方程。

回答2:

2分之3X+5等于3分之2x减1这道方程怎么解
同时乘以6得9x+30=4x-6
9x-4x=-6-30
5x=-36
x=-7又5分之1

回答3:

两边同时乘以2和3的公倍数,是6,后面的就自己算

回答4:

先移项得3/2x=-17/3,然后系数归1得x=-34/9

回答5:

  • 1/2x+15=1/3x解方程

本题为一元一次方程的计算,详细过程如下:

1/(2x+15)=1/3x,

2x+15=3x,

15=3x-2x,

X=15,

  • 此题验算过程如下:

左边=1/(2x+15)=1/(2*15+15)=1/45;

右边=1/3x=1/3*15=1/45 ,

左边=右边,即x=15是方程的解。

  • 知识拓展:

一元一次方程指只含有一个未知数、未知数的最高次数为1且两边都为整式的等式。一元一次方程只有一个根,一元一次方程可以解决绝大多数的工程问题、行程问题、分配问题、盈亏问题、积分表问题、电话计费问题、数字问题。

  • 一元一次方程的几何意义:

由于一元一次函数都可以转化为ax+b=0(a,b为常量,a≠0)的形式,所以解一元一次方程就可以转化为,当某一个函数值为0时,求相应的自变量的值。从图像上看,这就相当于求直线y=kx+b(k,b为常量,k≠0)与x轴交点的横坐标的值。

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