{2x-1/5 + 3n-1/4 =2,3x+1/3 - 3y+2 /4 = 4/3
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{2x-1/5+3n-1/4=2,3x+1/3-3y+2/4=4/3{2x-1/5+3n-1/4=2,3x+1/3-3y+2/4=4/3{2x-1/5+3n-1/4=2,3x+1/3-3y+2/4=4
{2x-1/5 + 3n-1/4 =2,3x+1/3 - 3y+2 /4 = 4/3
{2x-1/5 + 3n-1/4 =2,3x+1/3 - 3y+2 /4 = 4/3
{2x-1/5 + 3n-1/4 =2,3x+1/3 - 3y+2 /4 = 4/3
题目应是2x-1/5 + 3y-1/4 =2
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