早教吧作业答案频道 -->数学-->
(2/2)3x-2)=4(x-5),3(y+2)-2=2y-(y+5),3[y-2(y-1)]=4y这六道题方程怎样解
题目详情
(2/2)3x-2)=4(x-5),3(y+2)-2=2y-(y+5),3[y-2(y-1)]=4y这六道题方程怎样解
▼优质解答
答案和解析
3(x+1)-(3x-2)=4(x-5),
3x+3-3x+2=4x-20
4x=25
x=25/4
3(y+2)-2=2y-(y+5)
3y+6-2=2y-y-5
2y=-9
y=-9/2
3[y-2(y-1)]=4y
3y-6y+6=4y
7y=6
y=6/7
3x+3-3x+2=4x-20
4x=25
x=25/4
3(y+2)-2=2y-(y+5)
3y+6-2=2y-y-5
2y=-9
y=-9/2
3[y-2(y-1)]=4y
3y-6y+6=4y
7y=6
y=6/7
看了 (2/2)3x-2)=4(x...的网友还看了以下：