数学二元一次方程组的解
{5x-3y=16
{3x-5y=0
人气:359 ℃ 时间:2020-05-13 10:35:23
解答
{5x-3y=16 1
{3x-5y=0 2
1*3,得15x-9y=48 3
2*5,得15x-25y=0 4
3-4,得
15x-9y-15x+25y=48-0
16y=48
y=3
把y=3代入1,得5x-3*3=16
x=5
推荐
猜你喜欢
- the most discriminatory acts against Asian Americans by white Americans during the 19th and 20th centuries,and discuss t
- 1,2,3,6,11,20,37,( ) .
- 设函数f(x2+1)=(x2-1)/(2x2+1),则f(x)=
- 动词后面跟什么加形容词还是副词
- ( )的嘶叫 ( )地吐出 介绍得( ) 描绘得( ) 处理得( )
- It's too ____to play football in the street.空白处填d开头的单词!1111
- 加工厂去年获利润12.1万元,超过计划3.2万元,超过计划的百分之几?(百分号前保留一位小数)
- 正午太阳光照射时,物体的影子永远朝北的是什么地方