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3x+2y/4=2x+y+2/5=4x+5y/3(3x+2y)/4=(2x+y+2)/5=(4x+5y)/3
题目详情
3x+2y/4=2x+y+2/5=4x+5y/3
(3x+2y)/4=(2x+y+2)/5=(4x+5y)/3
(3x+2y)/4=(2x+y+2)/5=(4x+5y)/3
▼优质解答
答案和解析
可以分成(3x+2y)/4=(2x+y+2)/5和(2x+y+2)/5=(4x+5y)/3
对角相乘
(3x+2y)/4=(2x+y+2)/5
5(3x+2y)=4(2x+y+2)
15x+10y=8x+4y+8
7x+6y=8 (1)
(2x+y+2)/5=(4x+5y)/3
3(2x+y+2)=5(4x+5y)
6x+3y+6=20x+25y
14x+22y=6
7x+11y=3 (2)
(2)-(1)
5y=-5
y=-1
代入(2),7x-11=3
x=2
对角相乘
(3x+2y)/4=(2x+y+2)/5
5(3x+2y)=4(2x+y+2)
15x+10y=8x+4y+8
7x+6y=8 (1)
(2x+y+2)/5=(4x+5y)/3
3(2x+y+2)=5(4x+5y)
6x+3y+6=20x+25y
14x+22y=6
7x+11y=3 (2)
(2)-(1)
5y=-5
y=-1
代入(2),7x-11=3
x=2
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